Processes affecting radiometric dating techniques

28-Feb-2020 06:33 by 4 Comments

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In addition to orogeny, the orogen (once formed) is subject to other processes, such as sedimentation and erosion.The sequence of repeated cycles of sedimentation, deposition and erosion, followed by burial and metamorphism, and then by formation of granitic batholiths and tectonic uplift to form mountain chains, is called the orogenic cycle.

Formation of an orogen is accomplished in part by the tectonic processes of subduction (where a continent rides forcefully over an oceanic plate (noncollisional orogens)) or convergence of two or more continents (collisional orogens)., "to bend like a bow") structures, known as orogenic belts.For example, the Caledonian Orogeny refers to the Silurian and Devonian events that resulted from the collision of Laurentia with Eastern Avalonia and other former fragments of Gondwana.The Caledonian Orogen resulted from these events and various others that are part of its peculiar orogenic cycle.geography and mid ocean ridges, contributed greatly to the theory of plate tectonics.Even at a very early stage, life played a significant role in the continued existence of oceans, by affecting the composition of the atmosphere.The existence of oceans is critical to sea-floor spreading and subduction.

An example of thin-skinned deformation (thrust faulting) of the Sevier Orogeny in Montana.In summary, an orogeny is a long-lived deformational episode during which many geological phenomena play a role.The orogeny of an orogen is only part of the orogen's orogenic cycle.These island arcs may be added to a continent during an orogenic event.The processes of orogeny can take tens of millions of years and build mountains from plains or from the seabed.Sediments deposited in the foreland basin are mainly derived from the erosion of the actively uplifting rocks of the mountain range, although some sediments derive from the foreland.

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