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Earth Science

GRAND CANYON

TermDefinition
Law of Superposition Rock layers at the bottom are oldest; top are youngest
Original Horizontality All layers of rocks are deposited horizontally
Intrusion contact metamorphism all around it (top and bottom)
Extrusion contact metamorphism on the bottom only
unconformity gap in geologic records
index fossil a fossil that is formed at a very specific time period
orogeny crust is folded or distorted (change in earths crust caused by tectonic forces)
porosity how much empty space in the soil to hold water
permeability how easily water can pass through soil
infiltration how water enters soil from the surface
water retention how easily water can hold soil
runoff any water that does not get absorbed into the ground
deposition the process where sediments are added to a landform or landmass.
Relative age of rock layers Law of Superposition is used to determine the RAORL
Order of events in earths history the law of superposition helps determine this
downcutting the deepening of a river valley by erosion
Aquifers underground layers of rock, sand, and gravel that hold and transmit groundwater.
Created by: ahansonn
 

 



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