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UPCAT - General Science
VIII. Geology
Materials of the Earth
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Vernalica Mae
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Cards (11)
Igneous
rocks are formed by the cooling and hardening of magma
magma
is a molten material that is under the earth's surface
an igneous rock is
intrusive
if magma cools and solidifies beneath the earth's surface
an igneous rock is
extrusive
from lava which is magma that reached earth's surface
sedimentary
rocks are deposited at the bottom of the rivers, lakes and oceans
metamorphic
rocks are the hardest kind of rocks produced by hardening of igneous and sedimentary rocks
granite, gabbro, diabase, diorite, pegmatite, peridotite are examples of
intrusive
igneous rocks
pumice, obsidian, rhyolite, scoria and dacite are examples of
extrusive
igneous rocks
limestone, sandstone, dolomite, siltstone, gypsum, rock salt, chalk, coal are examples of
sedimentary
rocks
slate, gneiss, schist, and phyllite are examples of foliated metamorphic rocks
marble, quartzite, skarn, hornfels, ignite, garnet are examples of
non-foliated
metamorphic rocks