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Limestone pavement – Natural karst landform consisting of a flat, incised surface of exposed limestone. Mesa – Elevated area of land with a flat top and sides, usually much wider than buttes. Mushroom rock – Naturally occurring rock whose shape resembles a mushroom. Natural arch – Arch-shaped natural rock formation.
Limestone. Limestone ( calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium.
Hocking Hills State Park. / 39.43056°N 82.53889°W / 39.43056; -82.53889. Hocking Hills State Park is a state park in the Hocking Hills region of Hocking County, Ohio, United States. In some areas the park adjoins the Hocking State Forest. Within the park are over 25 miles (40 km) of hiking trails, rock formations, waterfalls, and ...
Mountain formation refers to the geological processes that underlie the formation of mountains. These processes are associated with large-scale movements of the Earth's crust ( tectonic plates ). [ 1] Folding, faulting, volcanic activity, igneous intrusion and metamorphism can all be parts of the orogenic process of mountain building. [ 2]
Appalachian Ohio is a bioregion and political unit in the southeastern part of the U.S. state of Ohio, characterized by the western foothills of the Appalachian Mountains and the Appalachian Plateau. The Appalachian Regional Commission defines the region as consisting of thirty-two counties. [ 1] This region roughly overlaps with the ...
The Appalachian Mountains formed through a series of mountain-building events over the last 1.2 billion years: [ 4][ 5] The Grenville orogeny began 1250 million years ago (Ma) and lasted for 270 million years. The Taconic orogeny began 450 Ma and lasted for 10 million years. The Acadian orogeny began 375 Ma and lasted 50 million years.
Polar Rock Repository. BPRC maintains a large, unique collection of geological samples and materials at the Polar Rock Repository. The PRR is a national facility that houses rock sample collections from Antarctica obtained by U.S. scientists over the past 40+ years. Dr. Anne Grunow is the curator of the Polar Rock Repository. It is the only ...
Mylonite, Owl Mountains, Poland. Mylonite is a fine-grained, compact metamorphic rock produced by dynamic recrystallization of the constituent minerals resulting in a reduction of the grain size of the rock. Mylonites can have many different mineralogical compositions; it is a classification based on the textural appearance of the rock.
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