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