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Geology/Stratigraphy of o.crust


Dear Sir,
         what is oceanic Stratigraphy ?
waqar Ahmed

Dear Waqar Ahmed, Goodevening

My answer for your question is as follows.

The stratigraphy of the ocean is nothing but study of the Floor of the Ocean or oceanic crust
Oceanic crust is the part of Earth's lithosphere that surfaces in the ocean basins. Oceanic crust is primarily composed of mafic rocks, or sima, which is rich in iron and magnesium. It is thinner than continental crust, or sial, generally less than 10 kilometers thick. oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries. Oceanic crust is about 6 km (4 miles) thick. It is composed of several layers, not including the overlying sediment. The topmost layer, about 500 metres (1,650 feet) thick, includes lavas made of basalt (that is, rock material consisting largely of plagioclase [feldspar] and pyroxene). Oceanic crust differs from continental crust in several ways: it is thinner, denser, younger, and of different chemical composition. Like continental crust, however, oceanic crust is destroyed in subduction zones.

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Dr D S Subrahmanyam


All questions related to Geology, Geotechnical Engineering (especially in-situ stress, in-situ Deformability and Shear investigations) required for underground tunnels and excavations, Dimensional Stone Mining. Can't answer Soil dynamics related to Geotechnical Engineering


Geology and Geotechnical Engineering and Dimensional Stone Mining

National Institute of Rock Mechanics (Govt of India)

International Journal of Mining Engineering and some other Indian journals

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