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21 Cards in this Set

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Type of material-Rock
When a piece of bedrock breaks off and free falls or bounces down a cliff.
Type of material-Debris
Unconsolidated material at earths surface
Type of material-Avalanche
Turbulent mixture of debris, water, ice, bedrock which flows downhill
Type of movement-Flow
Movement as a very viscous fluid
Permafrost
Impermeable material beneath saturated soil can be bedrock. Ground that has remained frozen for many years.
Soluflucation
Flow of water saturated debris over impermeable material.
Talus
An accumulation of broken rock at the base of a cliff.
Delta
A body of sediment deposited at the mouth of a river when the river slows down and flows into a body of standing water.
Distributaries
Small shifting river channel that carries water away from the main river channel and distributes it over the delta surface.
Relative Time
A sequence of events that take place rathe than the number of years involved.
Absolute time
Also called the numerical age. This is age gien in years or some other time unit.
Contacts
boundary surface that that separate two different rock types or rocks of different ages.
Physical Continuity
The ability to physically follow a rock unit between two places.
Cross-Cutting relationships
A disrupted pattern is older than the cause of disruption.
Superposition
In a sequence of undisturbed sedimentary rock or volcanic rock the layers get younger going from the bottom up.
Original horizontality
A principle that states beds of sediment deposited in water formed as horizontal or nearly horizontal layers.
Cenozoic Era
The most recent era, means new life.
Radioactive decay
The spontaneous nuclear disintegration of certain isotopes
Met. rock textures-nonfoliated
Planar alignment "mudstone"
Contact Metamorphism
High temperature, low differential pressure/stress, creates nonfoliated rock, i.e. marble, quartz
Regional metamorphism
High temperature, High differential pressure/stress. Creates foliated rock.