Petrology of the sedimentary rocks / Петрология осадочных горных пород

Издание 2
Автор(ы):Boggs S.
Издание:Cambridge University Press, 2009 г., 611 стр., ISBN: 978-0-511-71933-2
Язык(и)Английский
Petrology of the sedimentary rocks / Петрология осадочных горных пород

Sedimentary rocks form at low temperatures and pressures at the surface of Earth owing to deposition by water, wind, or ice. By contrast, igneous and metamorphic rocks form mainly below Earth’s surface where temperatures and pressures may be orders of magnitude higher than those at the surface, although volcanic rocks eventually cool at the surface. These fundamental differences in the origin of rocks lead to differences in physical and chemical characteristics that distinguish one kind of rock from another. Sedimentary rocks are characterized particularly by the presence of layers, although layers are also present in some volcanic and metamorphic rocks, and by distinctive textures and structures. Many sedimentary rocks are also distinguished from igneous and metamorphic rocks by their mineral and chemical compositions and fossil content.

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