Upper Mantle Rock Granite

Upper mantle rock granite.

Upper mantle rock granite. One of the persistent scientific objections to the earth being young 6 000 7 000 years old rather than 4 5 billion years and the flood being a year long mountain covering global event has been the apparent evidence that the large bodies of granite rocks found today at the earth s surface took millions of years to cool from magmas. The upper mantle of the earth is a very thick layer of rock inside the planet which begins just beneath the crust at about 10 km 6 2 mi under the oceans and about 35 km 22 mi under the continents and ends at the top of the lower mantle at 670 km 420 mi. In this paper we will investigate the pressure and temperature dependences of λ values for common categories of crystalline rocks from the earth s crust and upper mantle and explore the potential implications of λ as a discriminant of composition for common rock types in the earth s crust and upper mantle. Density 3 13 gm cm 3 amnh r mickens.

The rock that underlies the ocean is granite. The asthenosphere is located in the upper mantle. All magma develops underground in the lower crust or upper mantle because of the intense heat there. Continental crust has the average composition close to that of an igneous rock called basalt 660 kilometers zone b is the part of earth s mantle that extends from the base of zone a to a depth of about in some regions of earth.

Is the chief constituent of the earth s upper mantle. Taking conservative values of magma viscosities wall rock magma density differences and feeder dyke morphologies gives a range of q from 0 01 to 100 m 3 s 1 and places lower and upper bounds on. Some meteorites have the same composition as the earth s core. Peridotite is a dense coarse grained igneous rock consisting mostly of the minerals olivine and pyroxene peridotite is ultramafic as the rock contains less than 45 silica it is high in magnesium mg 2 reflecting the high proportions of magnesium rich olivine with appreciable iron peridotite is derived from the earth s mantle either as solid blocks and fragments or as crystals.

Igneous rocks can have many different compositions depending on the magma they cool from. All this action does not mix the upper mantle thoroughly however and geochemists think of the upper mantle as a rocky version of marble cake. Igneous rocks contain large amounts of carbon. The mantle is apparently molten throughout.