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Paraconformity. A paraconformity is a type of unconformity in which the sedimentary layers above and below the unconformity are parallel, but there is no obvious erosional break between them. A break in sedimentation is indicated, for example, by fossil evidence. It is also called nondepositional unconformity or pseudoconformity.
Lithostratigraphy is a sub-discipline of stratigraphy, the geological science associated with the study of strata or rock layers. Major focuses include geochronology, comparative geology, and petrology. In general, strata are primarily igneous or sedimentary relating to how the rock was formed.
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Solidified lava flow in Hawaii Sedimentary layers in Badlands National Park, South Dakota Metamorphic rock, Nunavut, Canada. Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία () 'study of, discourse') [1] [2] is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. [3]
Reports of the National Center for Science Education. 29(1):26. last accessed September 22, 2013. Rowan, C (2011) The making of an angular unconformity: Hutton’s unconformity at Siccar Point. Highly Allochthonous. last accessed September 22, 2013. Powell's Unconformity. Gorvett, Zaria (1 September 2021).
Eemian erosion surface in a fossil coral reef on Great Inagua, The Bahamas.Foreground shows corals truncated by erosion; behind the geologist is a post-erosion coral pillar which grew on the surface after sea level rose again.
Hutton's Unconformity is a name given to various notable geological sites in Scotland identified by the 18th-century Scottish geologist James Hutton as places where the junction between two types of rock formations can be seen.
A view looking north. Unkar Group units lying below the Isis Temple/Cheops Pyramid landforms: Shinumo Quartzite cliffs (lower part shown on top of photo), above Hakatai Shale (red-orange-purple slopes), above