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Science Module 6

Apologia Exploring Creation Layers of Earth Module 6

Catastrophism the view that most of the earth's geological features are the result of large-scale catastrophes such as floods, volcanic eruptions, etc.
Uniformitarianism the view that most of the earth's geological features are the result of slow, gradual processes that have been at work for millions or even billions of years
Humus the decayed remains of once-living creatures
minerals inorganic crystalline substances found naturally in the earth
weathering the process by which rocks are broken down b the forces of nature
erosion the process by which sediments and rock fragments are carried away by wind or rain
unconformity a surface of erosion that separates one layer of rock from another
Three Basic types of rock Igneous, Metamorphic, and Sedimentary
Igneous Rock Result of molten rock which cools and solidifies
Sedimentary Rock formed when sediments fuse together
Metamorphic Rock formed when either sedimentary or igneous rocks are exposed to extreme pressure
How is Sedimentary Rock laid down typically? by water
Which type of weathering is this...small chips of rock broken off are just miniature versions of the original rock? Example of Physical Weathering
Which type of weathering is this....limestone forming a gas and changing the composition of a rock Example of Chemical Weathering
Would you expect more erosion from a quickly moving river or a slower river? Quicker moving river
Which would experience more erosion, a barren hillside or a thick, grassy valley? Barren hillside
Delta fan shaped body of water where rivers deposit sediments
What are underground caverns formed by erosion caused by? Groundwater
Stalactites underground water sediments that form on the ceiling of a cavern
Stalagmites underground water sediments that form on the floor of a cavern
angular unconformity when rocks are slanted or tilted relative to rocks above it
Example of the Great Unconformity The Grand Canyon
Column When stalactite and stalagmite meet and form a single structure
Nonconformity when stratified layer rest on top of stratifies layers
disconformities where there are parallel, stratified rock layers above and below the unconformity, there is a clear surface of erosion between them
parconformities layer of rock that geologists believe contains an unconformity, but it cannot be identified
intrusion forms when magma from underneath the sedimentary rock gets injected in the cracks and fissures of the sedimentary rock
sills veins of igneous rock that run in the same direction of the strata
dikes veins of igneous rock that run perpendicular to the direction of the strata
Created by: grantham10