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Claystone – Clastic sedimentary rock composed primarily of clay-sized particles. Coal – Combustible sedimentary rock composed primarily of carbon. Conglomerate – Sedimentary rock composed of smaller rock fragments. Coquina – Sedimentary rock that is composed mostly of fragments of shells.
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.
Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina. Belogradchik Rocks, Balkan Mountains, Bulgaria. "Jaws", an erosional fin in Little Finland, Nevada, US. "Hajdučka vrata" on Čvrsnica, Herzegovina. Paklenica, Croatia. Devil's Town, Serbia. Three Sisters in Blue Mountains, Australia. A rock formation is an isolated, scenic, or ...
Aquamarine variety of beryl with tourmaline on orthoclase. Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico. Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals. Austinite from the Ojuela Mine, Mapimí, Durango, Mexico. Ametrine containing amethyst and citrine, from Bolivia.
Anorthosite Moon rock collected by Apollo 16 astronauts. It is approximately 3.9 billion years old and is the largest Moon rock brought from the Moon. Black Rock: Tooele County, Utah, United States: Large rock on the shoreline of Great Salt Lake. Black Stone: Kaaba, Great Mosque, Mecca, Saudi Arabia: A highly respected Islamic stone set in the ...
Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. As the sediments are buried they get compacted as more and more material is deposited on top. Eventually the sediments will become so dense that they would essentially form a rock. This process is known as lithification.
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There is uncertainty on how to translate the proper name Omarolluk (and omar rocks). According to the records of the Canada Centre for Mapping and Earth Observation Natural Resources, the features Omarolluk Sound and Omarolluk Formation were named after Omarolluk, an Inuit man who accompanied and guided R. J. Flaherty on numerous geological surveys of the Belcher Islands and elsewhere in the ...