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Geological formations consist of rock that was deposited during a specific period of time. They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed. Such sites may have separate entries if they are considered to be more notable than the formation as a whole.
Basalt columns seen on Porto Santo Island, Portugal. Columnar jointing of volcanic rocks exists in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern Ireland, in which the vertical joints form polygonal columns and give the impression of having been artificially constructed.
Rocks formations and the Dedo de Deus (God's Finger) peak in the background, Serra dos Órgãos National Park, Rio de Janeiro state, Brazil Raouché or Pigeons' Rock in Beirut, Lebanon Druid Arch, Canyonlands National Park, Utah, US View of Meteora, Greece Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina Belogradchik Rocks, Balkan Mountains, Bulgaria "Jaws", an erosional fin ...
Geologic formations of the Dominican Republic (2 C, 13 P) E. Geologic formations of Ecuador (7 C, 15 P) Geologic formations of Egypt (2 C, 8 P) Geologic formations of ...
In respect of the locality being a 'first-class paleontological site displaying high-quality reference material for scientists worldwide, including all known specimens of Archaeopteryx ', the International Union of Geological Sciences (IUGS) included the 'Jurassic Solnhofen-Eichstätt Archaeopteryx Serial Site' in its assemblage of 100 'geological heritage sites' around the world in a listing ...
Geology portal; Earth sciences portal; List of minerals – List of minerals with Wikipedia articles; List of rocks on Mars – Alphabetical list of named rocks and meteorites found on Mars; Rock cycle – Transitional concept of geologic time; List of rock formations: for a list of unusual or culturally significant rock outcrops
A high latitude, cool-temperate lacustrine ecosystem preserving detailed plant and insect fossils. [93] Sakamena Group [94] 260–247 Ma: Madagascar: Lower Sakamena Formation (Permian) and Middle Sakamena Formation (Triassic) contain fossils of animals lived around wetland environment, such as semi-aquatic and gliding neodiapsids.
Geologic time shown in a diagram called a geological clock, showing the relative lengths of the eons of Earth's history and noting major events The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale , a system of chronological measurement based on the study of the planet's rock ...