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Mary Lake State Natural Area

Adelaide Rd

Mercer, WI 54547

Mary Lake State Natural Area

The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.

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AARP Events for Mercer

AARP Events for Mercer

• Disrupt Aging Book Club

  Monday, Nov 25, 2024 at 9:30 a.m. CT

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• Enhance Your Workout With Yoga Fusion

  Monday, Nov 25, 2024 at 10:00 a.m. CT

  Zoom

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• Moving with Milly: Chair Exercises for Improved Mobility

  Monday, Nov 25, 2024 at 10:00 a.m. CT

  Zoom

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											<div>Adelaide Rd</div>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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												<span>54547</span>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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		<header><h1 class="article-headline">Mary Lake State Natural Area</h1></header>

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											<div>Adelaide Rd</div>
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							<span>Mercer</span>,
							<span>WI</span>
												<span>54547</span>
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										<a href="https://dnr.wi.gov/topic/Lands/naturalareas/index.asp?SNA=264" target="_blank">Mary Lake State Natural Area</a>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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							<span>Mercer</span>,
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 118

Warning (2): include() [<a href='http://php.net/function.include'>function.include</a>]: Failed opening '/var/www/vhosts/vcc_staging/app/Resource/aarp2_master.bodyTargeting.html' for inclusion (include_path='/var/www/vhosts/vcc_staging/lib:.:/usr/share/pear:/usr/share/php') [APP/View/Layouts/aarp_2023.ctp, line 243]
Code Context
            <?php if (!$nowrapper):  // MLW - Spanish wrappers TBD
                    include (APP . "Resource/aarp2_master.footer.html");
                    include (APP . "Resource/aarp2_master.bodyTargeting.html");
$viewFile = '/var/www/vhosts/vcc_staging/app/View/Layouts/aarp_2023.ctp'
$dataForView = array(
	'content_for_layout' => '<div class="row twoColumnLayout">
	<div class="col-md-8 left-rail"><div class="module clearfix"><div class="ar-basic-box">
	<div class="module-spacer">
		<header><h1 class="article-headline">Mary Lake State Natural Area</h1></header>

		<div class="row">
			<div class="col-sm-6 left module-spacer">
				<p>
					<div>
											<div>Adelaide Rd</div>
											<div>
							<span>Mercer</span>,
							<span>WI</span>
												<span>54547</span>
											</div>
					</div>
				</p>
								<div>
					<i class="fa fa-external-link-square"></i> 
										<a href="https://dnr.wi.gov/topic/Lands/naturalareas/index.asp?SNA=264" target="_blank">Mary Lake State Natural Area</a>
								</div>
								
			</div>
			<div class="col-sm-6 module-spacer">
				<iframe width="100%" height="220" frameborder="0" style="border:0" src="https://www.google.com/maps/embed/v1/place?key=AIzaSyCU5aZylcrTOLke9e3U0F2mXovlZ4bL8yk&q=Mary+Lake+State+Natural+Area%2C+Adelaide+Rd%2C+Mercer%2C+WI+54547" allowfullscreen> </iframe>
			</div>
		</div>


				<div class="module-spacer clearfix">
						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

	<div class="reportthis" style="margin-bottom: 20px;">
                <form method="post" action="/mercer-wi/report/place/mary-lake-state-natural-area-mercer-wi.html">
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<a data-formelementid="CSN-LOCAL-HC-PLSK-02272024" 
	href="/mercer-wi/home-and-community/?intcmp=CSN-LOCAL-HC-PLSK-02272024"><img class="img-responsive" 
	alt="Explore the free AARP HomeFit Guide" title="Explore the free AARP HomeFit Guide" 
	src="https://cdn-aarp.americantowns.com/img/touts/HomeFit_750x150.png"></a>
</div></div></div>
	<div class="col-md-4 right-rail thin-rhs"><div class="module clearfix"><!--default-->
<!-- module_RHS - AARP Events -->

<div class="ar-basic-box module-spacer">
	<header>
		<div class="pull-right">
			<a href="/mercer-wi/aarp-events/" data-formelementid="LOCAL-BTN-CLK-SEEALL-EVENTS">
				<img style="width:30px;" src="https://cdn-aarp.americantowns.com/img/template/icons/aarp_event_icon.png" alt="Upcoming AARP Events" />
			</a>
		</div>
		<h2 class="visible-lg">AARP Events for Mercer</h2>
		<h2 class="hidden-lg">AARP Events for Mercer</h2>
	</header>
	<div class="wrap">
		<div class="ar-listing snippet">
			<ul class="list">
				<li class="item" data-pageindex="1">

					
					<h2 class="title"><a href="/aarp-event/aarp-mi-disrupt-aging-book-club-11252024-pwn732szj7q.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-DISRUPT-AGING-BOOK-CLUB">Disrupt Aging Book Club</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 9:30&nbsp;a.m. CT</p>
					<p class="venue"></p>
					<p class="loc">Online Event</p>
					
				</li><li class="item" data-pageindex="1">

					
					<h2 class="title"><a href="/aarp-event/aarp-nm-fitness-virtual-yoga-fusion-class-11252024-vfns4ghnpl5.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-ENHANCE-YOUR-WORKOUT-WITH-YOGA-FUSION">Enhance Your Workout With Yoga Fusion</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 10:00&nbsp;a.m. CT</p>
					<p class="venue">Zoom</p>
					<p class="loc">Online Event</p>
					
				</li><li class="item" data-pageindex="1">

					
					<h2 class="title"><a href="/aarp-event/aarp-pa-moving-with-milly-11252024-nxn278l9wf5.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-MOVING-WITH-MILLY-CHAIR-EXERCISES-FOR-IMPROVED-MOBILITY">Moving with Milly: Chair Exercises for Improved Mobility</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 10:00&nbsp;a.m. CT</p>
					<p class="venue">Zoom</p>
					<p class="loc">Online Event</p>
					
				</li>			</ul>

			<p><a class="link-red" href="/mercer-wi/aarp-events/" data-formelementid="LOCAL-BTN-CLK-SEEALL-EVENTS">View All AARP Events<i class="ml-1 fas fa-chevron-right"></i></a></p>
	
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<div aria-hidden="true" class="aarpe-ad-wrapper">
                    
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                                  AARP.ads.slots({ id:'300x250_53475', size:'300x250'});
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                    </div>
                </div>
<div class="card-tout card-dark membership-tout" style="margin:0 0 30px 0;">
	<img class="img-responsive image" 
		title="image of two AARP membership cards"
		alt="image of two AARP membership cards" 
		src="https://cdn-aarp.americantowns.com/img/tout-two-cards.png">
	<div class="title">Only $12 your first year with Automatic Renewal</div>
	<ul class="list">
		<li>Immediate access to your <a href="https://www.aarp.org/benefits-discounts/">member benefits</a></li>
		<li>Discounts on travel and everyday savings</li>
		<li>Subscription to AARP The Magazine</li>
		<li>FREE second membership</li>
	</ul>
	<div class="action">
		<a class="btn" href="https://appsec.aarp.org/mem/join?campaignid=UAJFT3&intcmp=LNK-CSN-AARPLOCAL-JRTOUT-RR-A-MERCER-WI">Join AARP</a>
		<div class="body">Already a member? <a href="https://appsec.aarp.org/mem/renew?campaignid= UARFT3&intcmp=LNK-CSN-AARPLOCAL-JRTOUT-RR-A-MERCER-WI">Renew</a> or 
			<a href="https://www.aarp.org/benefits-discounts/my-membership/print-your-card/">Print Card</a></div>
	</div>
</div>
<style>
.membership-tout {padding:16px 20px;}
.membership-tout .list li { margin: 0; }
</style>
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                                if(typeof AARP.ads !== 'undefined'){
                                  AARP.ads.slots({ id:'300x250_93505', size:'300x250'});
                                }
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                    </div>
                </div>
<div class="module-spacer text-center">
<div class="fb-page" alt="Image of AARP Wisconsin Facebook Page" title="Image of AARP Wisconsin Facebook Page" data-href="https://www.facebook.com/aarpwisconsin" data-tabs="timeline" width="320" height="" data-small-header="false" data-adapt-container-width="true" data-hide-cover="false" data-show-facepile="true" lazy="true">
	<blockquote cite="https://www.facebook.com/aarpwisconsin" class="fb-xfbml-parse-ignore"><a href="https://www.facebook.com/aarpwisconsin">Facebook</a></blockquote>
</div>
</div>

 
<div class="ar-basic-box module-spacer">
<header>
<h2>Contact AARP<br />Wisconsin</h2>
</header>
<div class="wrap">

<div class="ar-quick-list module-spacer">
<ul class="list-unstyled">
<li><i class="list-icon fa fa-envelope" alt="Email icon" title="Email icon" aria-hidden="true"></i><a href="mailto:WIAARP@aarp.org" target="_blank" rel="noopener">WIAARP@aarp.org</a></li>
<li><i class="list-icon fa fa-globe" alt="Globe icon" title="Globe icon" aria-hidden="true"></i><a href="https://states.aarp.org/region/wisconsin/" target="_blank" rel="noopener">AARP Wisconsin</a></li>
<li><i class="list-icon fa fa-map-marker" alt="Map Marker icon" title="Map Marker icon" aria-hidden="true"></i><a href="https://states.aarp.org/heres-what-aarp-is-doing-in-wisconsin/?intcmp=SNG-LNK-AARPLOCAL-CONTACT-20140101-MERCER-WI" target="_blank" rel="noopener">Contact Us</a></li>


</ul>
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<a href="https://www.facebook.com/aarpwisconsin" target="_blank" rel="noopener" aria-label="Open Facebook"><img alt="Facebook icon" title="Facebook icon" src="https://cdn-aarp.americantowns.com/img/responsive/icons/48/facebook-dreamstale25.png"></a>&nbsp;&nbsp;
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</div></div>
	<div class="col-md-8 left-rail left-bot"></div>
	<div class="col-md-4 right-rail right-bot thin-rhs"></div>
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			window.location = jQuery(this).attr('href');
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<meta content="The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the" name="description"/>
<meta content="Mary, Lake, State, Natural, Area, Mercer, WI" name="keywords"/>
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	'title_for_layout' => 'Place Detail - AARP'
)
$content_for_layout = '<div class="row twoColumnLayout">
	<div class="col-md-8 left-rail"><div class="module clearfix"><div class="ar-basic-box">
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		<header><h1 class="article-headline">Mary Lake State Natural Area</h1></header>

		<div class="row">
			<div class="col-sm-6 left module-spacer">
				<p>
					<div>
											<div>Adelaide Rd</div>
											<div>
							<span>Mercer</span>,
							<span>WI</span>
												<span>54547</span>
											</div>
					</div>
				</p>
								<div>
					<i class="fa fa-external-link-square"></i> 
										<a href="https://dnr.wi.gov/topic/Lands/naturalareas/index.asp?SNA=264" target="_blank">Mary Lake State Natural Area</a>
								</div>
								
			</div>
			<div class="col-sm-6 module-spacer">
				<iframe width="100%" height="220" frameborder="0" style="border:0" src="https://www.google.com/maps/embed/v1/place?key=AIzaSyCU5aZylcrTOLke9e3U0F2mXovlZ4bL8yk&q=Mary+Lake+State+Natural+Area%2C+Adelaide+Rd%2C+Mercer%2C+WI+54547" allowfullscreen> </iframe>
			</div>
		</div>


				<div class="module-spacer clearfix">
						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

	<div class="reportthis" style="margin-bottom: 20px;">
                <form method="post" action="/mercer-wi/report/place/mary-lake-state-natural-area-mercer-wi.html">
        <button type="submit" class="btn btnregister pull-right" style="margin-bottom: 10px;">Flag This Place</button>
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            </div>

    <div class="report_button_message">Please use "Flag This Place" to alert us about content that is inappropriate or needs immediate attention. Nothing you submit will be shared with other site visitors. 
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    <style>
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</div>
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<a data-formelementid="CSN-LOCAL-HC-PLSK-02272024" 
	href="/mercer-wi/home-and-community/?intcmp=CSN-LOCAL-HC-PLSK-02272024"><img class="img-responsive" 
	alt="Explore the free AARP HomeFit Guide" title="Explore the free AARP HomeFit Guide" 
	src="https://cdn-aarp.americantowns.com/img/touts/HomeFit_750x150.png"></a>
</div></div></div>
	<div class="col-md-4 right-rail thin-rhs"><div class="module clearfix"><!--default-->
<!-- module_RHS - AARP Events -->

<div class="ar-basic-box module-spacer">
	<header>
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			<a href="/mercer-wi/aarp-events/" data-formelementid="LOCAL-BTN-CLK-SEEALL-EVENTS">
				<img style="width:30px;" src="https://cdn-aarp.americantowns.com/img/template/icons/aarp_event_icon.png" alt="Upcoming AARP Events" />
			</a>
		</div>
		<h2 class="visible-lg">AARP Events for Mercer</h2>
		<h2 class="hidden-lg">AARP Events for Mercer</h2>
	</header>
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					<h2 class="title"><a href="/aarp-event/aarp-mi-disrupt-aging-book-club-11252024-pwn732szj7q.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-DISRUPT-AGING-BOOK-CLUB">Disrupt Aging Book Club</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 9:30&nbsp;a.m. CT</p>
					<p class="venue"></p>
					<p class="loc">Online Event</p>
					
				</li><li class="item" data-pageindex="1">

					
					<h2 class="title"><a href="/aarp-event/aarp-nm-fitness-virtual-yoga-fusion-class-11252024-vfns4ghnpl5.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-ENHANCE-YOUR-WORKOUT-WITH-YOGA-FUSION">Enhance Your Workout With Yoga Fusion</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 10:00&nbsp;a.m. CT</p>
					<p class="venue">Zoom</p>
					<p class="loc">Online Event</p>
					
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					<h2 class="title"><a href="/aarp-event/aarp-pa-moving-with-milly-11252024-nxn278l9wf5.html" data-formelementid="LOCAL-BTN-CLK-EVENTS-MOVING-WITH-MILLY-CHAIR-EXERCISES-FOR-IMPROVED-MOBILITY">Moving with Milly: Chair Exercises for Improved Mobility</a></h2>
					<p class="time">Monday, Nov 25, 2024 at 10:00&nbsp;a.m. CT</p>
					<p class="venue">Zoom</p>
					<p class="loc">Online Event</p>
					
				</li>			</ul>

			<p><a class="link-red" href="/mercer-wi/aarp-events/" data-formelementid="LOCAL-BTN-CLK-SEEALL-EVENTS">View All AARP Events<i class="ml-1 fas fa-chevron-right"></i></a></p>
	
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                </div>
<div class="card-tout card-dark membership-tout" style="margin:0 0 30px 0;">
	<img class="img-responsive image" 
		title="image of two AARP membership cards"
		alt="image of two AARP membership cards" 
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	<div class="title">Only $12 your first year with Automatic Renewal</div>
	<ul class="list">
		<li>Immediate access to your <a href="https://www.aarp.org/benefits-discounts/">member benefits</a></li>
		<li>Discounts on travel and everyday savings</li>
		<li>Subscription to AARP The Magazine</li>
		<li>FREE second membership</li>
	</ul>
	<div class="action">
		<a class="btn" href="https://appsec.aarp.org/mem/join?campaignid=UAJFT3&intcmp=LNK-CSN-AARPLOCAL-JRTOUT-RR-A-MERCER-WI">Join AARP</a>
		<div class="body">Already a member? <a href="https://appsec.aarp.org/mem/renew?campaignid= UARFT3&intcmp=LNK-CSN-AARPLOCAL-JRTOUT-RR-A-MERCER-WI">Renew</a> or 
			<a href="https://www.aarp.org/benefits-discounts/my-membership/print-your-card/">Print Card</a></div>
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<h2>Contact AARP<br />Wisconsin</h2>
</header>
<div class="wrap">

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<ul class="list-unstyled">
<li><i class="list-icon fa fa-envelope" alt="Email icon" title="Email icon" aria-hidden="true"></i><a href="mailto:WIAARP@aarp.org" target="_blank" rel="noopener">WIAARP@aarp.org</a></li>
<li><i class="list-icon fa fa-globe" alt="Globe icon" title="Globe icon" aria-hidden="true"></i><a href="https://states.aarp.org/region/wisconsin/" target="_blank" rel="noopener">AARP Wisconsin</a></li>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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		<header><h1 class="article-headline">Mary Lake State Natural Area</h1></header>

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											<div>Adelaide Rd</div>
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							<span>Mercer</span>,
							<span>WI</span>
												<span>54547</span>
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					<i class="fa fa-external-link-square"></i> 
										<a href="https://dnr.wi.gov/topic/Lands/naturalareas/index.asp?SNA=264" target="_blank">Mary Lake State Natural Area</a>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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							<span>Mercer</span>,
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										<a href="https://dnr.wi.gov/topic/Lands/naturalareas/index.asp?SNA=264" target="_blank">Mary Lake State Natural Area</a>
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						<p>The 3-acre Mary Lake is one of very few known meromictic lakes in Wisconsin. Meromixis, the permanent thermal stratification of the water, results from the lake having an extremely small surface area in comparison to its depth. Mary Lake has a small 3-acre surface area but is disproportionately very deep - 67 feet. Due to the extreme relative depth in relation to surface area, watershed soils, and its protection from surrounding uplands, Mary Lake never "turns over" and circulates as the water temperature changes in the spring and fall as is typical of most other Wisconsin lakes. Instead, the lake stays stratified creating unusual chemical and biological layers. Internationally known to limnologists, extensive research has been conducted on the physical, biological, and chemical properties of the lake since the 1920's. Mary Lake is second in a chain of five interconnected lakes and is primarily fed by land runoff and inflow from a small stream that connects Mary Lake to nearby Lake Rose. Mary Lake is nestled in a small basin and surrounded by dense forest, which helps shelter the lake from wind action. The surrounding forest is primarily second-growth northern hardwood forest, swamp hardwoods, and swamp conifers. Dominant species include white cedar, spruce, white pine, and balsam fir. Mary Lake is owned by the DNR and was designated a State Natural Area in 1999.</p>		</div>
		

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