final quiz terms Flashcards
convergent
2 plates push into each other
divergent
2 plates pull from each other creating new floor
transform
2 plates rub past each other
law of original horizontality
layers of sediment are generally deposited in a horizontal position
law of original continuity
beds originate as continuous layers that extend in all directions
law of superposition
In an undeformed sequence of sed rocks, each bed is older than the one above and younger than the one below
law of inclusions
fragments of one rock unit that are enclosed within another rock unit then the rock with other rock fragments is older (xenoliths)
cross cutting relations
younger features cut across older features
baked contacts
zones of metamorphism, the heat of an intrusion will bake (metamorphose) the rocks in close proximity to the intrusion.
angular unconformity
tilted roks are overlain by flat-lying rocks
unconformities
a break in the rock record produced by non deposition and erosion of rock
disconformity
sedimentary strata on either side of the unconformity are parallel
nonconformity
sedimentary strata overlay metamorphic or igneous rock
gradient
It is the vertical drop of the stream over a horizontal distance.
types of dip-slip faults
normal, reverse, thrust
