Chapter 5 Rock Test Review

STUDY
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Terms in this set (...)

where do most metamorphic rocks form?
deep underground
Texture
look and feel of rocks surface
Porphyritic texture
has large and small crystals
process needed for sedimentary rocks to form
Erosion Deposition Compaction Cementation
Erosion
Water or wind loosen and carry away rock fragments
Deposition
sediment settles out
Compaction
Sediments are pressed together
cementation
dissolved minerals crystalize and glue sediments together
how are the major rock groups determined
by how they are formed
chemical rock
minerals crystalize from a solution
clastic rock
made of rock fragments
rocks
are a mixture of minerals, are a solid mass of minerals
foliated
grains are arranged in layers or bands
rock cycle
rocks changing from one type to another
igneous rock
from molten material
metamorphic rock
existing rock is changed by heat and pressure
cleavage
the way the rock splits along a flat surface
what drives the rock cycle
heat from inside the earth
fossils
occur in sedimentary rock
magma
inside the earth
basalt
igneous
ripple marks in sedimentary rock show...
it was made on a beach or in a stream
lava
on earths surface
cooling rate
slow: coarse grain
fast:fine grain
smaller sediments
are carried further away than larger ones
conglomerate
sedimentary rock
intrusive rock
rock cooled inside the earth
extrusive rock
rock cooled on the earths exterior