What is the concept of geosyncline?
geosyncline, linear trough of subsidence of the Earth’s crust within which vast amounts of sediment accumulate. The filling of a geosyncline with thousands or tens of thousands of feet of sediment is accompanied in the late stages of deposition by folding, crumpling, and faulting of the deposits.
How is geosyncline formed?
According to Holmes the rocks of the lower layer of the crust, as referred to above, are metamorphosed due to compression caused by converging convective currents. This metamorphism increases the density of rocks, with the result the lower layer of the crust is subjected to subsidence and thus a geosyncline is formed.
Who proposed Geosynclinal theory?
History. The geosyncline concept was first conceived by the American geologists James Hall and James Dwight Dana in the mid-19th century, during the classic studies of the Appalachian Mountains. Émile Haug further developed the geosyncline concept, and introduced it to Europe in 1900.
How many types of geosyncline are there?
Geosynclines are further classified into miogeosynclines, eugeosynclines, and orthogeosynclines; dependent on rock strata, location, and nature of the mountain system. A miogeosyncline forms along the passive margin of a continent and is comprised of sandstones, limestones, and shales (Continental Drift).
What is geosyncline give example?
noun. 1. The definition of a geosyncline is a long trough in the surface of the earth where sediments and deposits collect, thought of in the late 19th century and early 20th century as the origin of most mountains. An example of a geosyncline is the Adelaide Rift Complex in South Australia.
What is geosyncline Class 9?
Class 9th. Answer : A geosyncline is a large-scale depression in the Earth’s crust containing very thick deposits. Result of the upliftment of the sediments in a basin: (a) It results in the formation of lofty mountains, especially when the adjacent area rocks subside due to the collision of the plates.
What is geosyncline depression?
geosyncline. / (ˌdʒiːəʊˈsɪŋklaɪn) / noun. a broad elongated depression in the earth’s crust containing great thicknesses of sediment.
What are geosynclines Upsc?
Geosynclines are the area of long, wide, and shallow depression of the water body bordered by rigid masses and get huge sedimentation deposition from surrounding areas. continued for a long time and which during the period of deposition has suffered subsidence.
What is meant by Geosynclinal depression?
What is geosyncline Class 11?
A geosyncline is a large-scale depression in the Earth’s crust containing very thick deposits. It is a linear trough of subsidence of the Earth’s crust within which vast amounts of sediment accumulate.