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Closely related to intercalated contacts is interfingering (also known as intertonguing, [7] interdigitating, or interlocking [8]) of laterally adjacent sedimentary rock bodies. Here the contact breaks down into a series of wedges or tongues that penetrate the adjacent rock body and pinch out individually.
In geology, interbedding occurs when beds (layers of rock) of a particular lithology lie between or alternate with beds of a different lithology. [1] For example, sedimentary rocks may be interbedded if there were sea level variations in their sedimentary depositional environment .
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
Kankar or (kunkur) is a sedimentological term derived from Hindi (and ultimately Sanskrit) which is occasionally applied in both India [1] and the United States to detrital or residual rolled, often nodular calcium carbonate formed in soils of semi-arid regions. [2] It is used in the making of lime and of roads. [3]
Simple model for transpression: strike-slip zone with an additional and simultaneous shortening across the zone.Also induces vertical uplift. In geology, transpression is a type of strike-slip deformation that deviates from simple shear because of a simultaneous component of shortening perpendicular to the fault plane.
QAPF diagram for the classification of plutonic rocks Devils Tower, United States, an igneous intrusion exposed when the surrounding softer rock eroded away. Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, such as batholiths, dikes, sills, laccoliths, and volcanic necks.
Diastrophism by 2011 Tohoku earthquake. Diastrophism is the process of deformation of the Earth's crust which involves folding and faulting.Diastrophism can be considered part of geotectonics.
Doab (English: / ˈ d oʊ ɑː b /) is a term used in South Asia [1] for the tract [2] [1] of land lying between two confluent rivers. It is similar to an interfluve. [3] In the Oxford Hindi-English Dictionary, R. S. McGregor refers to its Persian origin in defining it as do-āb (دوآب, literally "two [bodies of] water") "a region lying between and reaching to the confluence of two rivers."