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[]: 1
[Name]: Arthur B. Williams Memorial Woods
[Image]:
[Date]: 1974
[Location]: 41°33′44″N 81°25′36″W / 41.562282°N 81.426792°W / 41.562282; -81.426792 (Arthur B. Williams Memorial Woods)
[County]: Cuyahoga
[Ownership]: municipal
[Description]: A remarkably pristine remnant beech-maple forest -
[]: 2
[Name]: Blacklick Woods
[Image]:
[Date]: 1974
[Location]: 39°56′14″N 82°48′28″W / 39.937222°N 82.807778°W / 39.937222; -82.807778 (Blacklick Woods)
[County]: Fairfield
[Ownership]: county
[Description]: An outstanding example of relatively undisturbed, old-growth beech-maple and swamp forest communities -
[]: 3
[Name]: Brown's Lake Bog
[Image]:
[Date]: 1967
[Location]: 40°40′51″N 82°03′45″W / 40.6809°N 82.0624°W / 40.6809; -82.0624 (Brown's Lake Bog)
[County]: Wayne
[Ownership]: private
[Description]: One of the few well-preserved, virgin boreal acid bogs remaining in a region where wetlands have been drained for agricultural use. -
[]: 4
[Name]: Buzzardroost Rock, Lynx Prairie, The Wilderness
[Image]:
[Date]: 1967
[Location]: 38°45′34″N 83°24′25″W / 38.759381°N 83.407013°W / 38.759381; -83.407013 (Lynx Prairie)
[County]: Adams
[Ownership]: private
[Description]: Supports many rare or uncommon species and it has an almost 50- year history of scientific observations. -
[]: 5
[Name]: Cedar Bog
[Image]:
[Date]: 1967
[Location]: 40°03′34″N 83°47′44″W / 40.059444°N 83.795556°W / 40.059444; -83.795556 (Cedar Bog)
[County]: Champaign
[Ownership]: state
[Description]: An excellent example of a marl swamp. Part of Cedar Bog State Nature Preserve. -
[]: 6
[Name]: Clear Fork Gorge
[Image]:
[Date]: 1967
[Location]: 40°36′40″N 82°17′13″W / 40.610982°N 82.286827°W / 40.610982; -82.286827 (Clear Fork Gorge)
[County]: Ashland
[Ownership]: state
[Description]: Clearly illustrates evidence of stream reversal due to the Wisconsin glacier. Located in Mohican State Park. -
[]: 7
[Name]: Clifton Gorge
[Image]:
[Date]: 1967
[Location]: 39°47′38″N 83°49′53″W / 39.793903°N 83.831525°W / 39.793903; -83.831525 (Clifton Gorge)
[County]: Greene
[Ownership]: state
[Description]: Exemplary of interglacial and postglacial canyon-cutting into the dolomites of the Niagara Escarpment. Part of Clifton Gorge State Nature Preserve. -
[]: 8
[Name]: Crall Woods
[Image]:
[Date]: 1974
[Location]: 41°01′42″N 82°26′04″W / 41.028219°N 82.434376°W / 41.028219; -82.434376 (Crall Woods)
[County]: Ashland
[Ownership]: private
[Description]: A near-virgin remnant of maple-basswood-beech forest-type. -
[]: 9
[Name]: Cranberry Bog
[Image]:
[Date]: 1968
[Location]: 39°55′54″N 82°28′06″W / 39.931545°N 82.468232°W / 39.931545; -82.468232 (Cranberry Bog)
[County]: Licking
[Ownership]: state
[Description]: The only known bog of its type in existence. Part of Cranberry Bog State Nature Preserve. -
[]: 10
[Name]: Dysart Woods
[Image]:
[Date]: 1967
[Location]: 39°59′05″N 80°59′51″W / 39.9846°N 80.9976°W / 39.9846; -80.9976 (Dysart Woods)
[County]: Belmont
[Ownership]: state
[Description]: One of the finest remaining examples of the white oak forests of eastern Ohio. Managed by Ohio University. -
[]: 11
[Name]: Fort Hill State Memorial
[Image]:
[Date]: 1974
[Location]: Hillsboro39°06′47″N 83°24′23″W / 39.1131°N 83.4063°W / 39.1131; -83.4063 (Fort Hill State Memorial)
[County]: Highland
[Ownership]: state
[Description]: Excellent outcrops of Silurian, Devonian, and Mississippian sedimentary bedrock and a natural bridge. -
[]: 12
[Name]: Glacial Grooves State Memorial
[Image]:
[Date]: 1967
[Location]: 41°36′59″N 82°42′23″W / 41.616304°N 82.70652°W / 41.616304; -82.70652 (Glacial Grooves State Memorial)
[County]: Erie
[Ownership]: state
[Description]: Very large limestone glacial grooves. -
[]: 13
[Name]: Glen Helen Natural Area
[Image]:
[Date]: 1965
[Location]: 39°48′15″N 83°52′54″W / 39.804125°N 83.881697°W / 39.804125; -83.881697 (Glen Helen Natural Area)
[County]: Greene
[Ownership]: private
[Description]: Includes a waterfall that carved a large travertine bowl around its pool. -
[]: 14
[Name]: Goll Woods
[Image]:
[Date]: 1974
[Location]: 41°33′15″N 84°21′42″W / 41.554294°N 84.361738°W / 41.554294; -84.361738 (Goll Woods)
[County]: Fulton
[Ownership]: state
[Description]: One of the best remaining examples of an oak-hickory dominated forest in Ohio. Part of Goll Woods State Nature Preserve. -
[]: 15
[Name]: Hazelwood Botanical Preserve
[Image]:
[Date]: 1974
[Location]:
[County]: Hamilton
[Ownership]: state
[Description]: Highly detailed study of the site’s plant ecology was published in 1929. Managed by the University of Cincinnati. -
[]: 16
[Name]: Highbanks Natural Area
[Image]:
[Date]: 1980
[Location]: 40°08′38″N 83°01′42″W / 40.143889°N 83.028333°W / 40.143889; -83.028333 (Highbanks Natural Area)
[County]: Delaware, Franklin
[Ownership]: county
[Description]: A forested bluff overlooking the Olentangy River. -
[]: 17
[Name]: Holden Natural Area
[Image]:
[Date]: 1967
[Location]:
[County]: Geauga, Lake
[Ownership]: private
[Description]: A complex of three natural areas. -
[]: 18
[Name]: Hueston Woods
[Image]:
[Date]: 1967
[Location]: 39°34′21″N 84°44′29″W / 39.5725°N 84.741389°W / 39.5725; -84.741389 (Hueston Woods)
[County]: Butler, Preble
[Ownership]: state
[Description]: A noteworthy example of beech-maple climax forest that has never been cut. Located in Hueston Woods State Park. -
[]: 19
[Name]: Mantua Swamp
[Image]:
[Date]: 1976
[Location]: 41°16′49″N 81°12′41″W / 41.280278°N 81.211389°W / 41.280278; -81.211389 (Mantua Swamp)
[County]: Portage
[Ownership]: private
[Description]: Contains many different wetland communities. -
[]: 20
[Name]: Mentor Marsh
[Image]:
[Date]: 1964
[Location]: 41°43′45″N 81°18′20″W / 41.729164°N 81.305492°W / 41.729164; -81.305492 (Mentor Marsh)
[County]: Lake
[Ownership]: state
[Description]: Consists of marsh vegetation, aquatic plants, swamp and bottomland forest, and upland forest. Part of Mentor Marsh State Nature Preserve. -
[]: 21
[Name]: Serpent Mound Cryptoexplosive Structure
[Image]:
[Date]: 1980
[Location]: 39°02′00″N 83°24′00″W / 39.033333°N 83.4°W / 39.033333; -83.4 (Serpent Mound crater)
[County]: Adams, Highland, Pike
[Ownership]: private
[Description]: A structure of undetermined origin exposed by differential erosion. -
[]: 22
[Name]: Tinker's Creek Gorge
[Image]:
[Date]: 1967
[Location]: 41°21′54″N 81°36′35″W / 41.365°N 81.609722°W / 41.365; -81.609722 (Tinker's Creek Gorge)
[County]: Cuyahoga
[Ownership]: municipal
[Description]: Contains a virgin oak-hickory and virgin beech-maple-hemlock forest. -
[]: 23
[Name]: White Pine Bog Forest
[Image]:
[Date]: 1976
[Location]:
[County]: Geauga
[Ownership]: municipal, private
[Description]: The only remaining near-virgin remnant white pine boreal bog in Ohio.
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