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10 Cards in this Set

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the process by which rocks are formed, changed and destroyed by geological processes
rock cycle
type of rock formed by sedimentation of material at the Earth's surface and within bodies of water
sedimentary
the order in which sedimentary deposits are layered one above the other
superposition
arrangement of rocks and deposits in the order in which they occurred
relative dating
determining the age of an object with reference to a specific time scale, such as a calendar
absolute dating
an interruption of sedimentation, usally caused by erosion
unconformity
decomposition of radioactive material over time
radioactive decay
determining the age of an object based on the amount of radioactive decay of the object
radioactive dating
the time required for one half of the atoms of a given amount of a radioactive substance to disintegrate
half-life
any remains or trace of a living thing of a former geologic age, e.g., a footprint, skeleton, etc.
fossil