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Relative Dating

QuestionA
older on the bottom, younger on the top law of superposition
the age of a fossil/rock layer compared to the age of the fossils/rock layers around it relative age
the exact age of a fossil as determined by radio active decay absolute dating
occurs when magma forces its way up into existing rock layers and hardens and cools before reaching the ground intrusion
a lava flow covers the top of an existing rock layer extrusion
a crack in the Earth that is always younger than the rock layers it cuts through fault
a gap in the geologic rock record unconformity
a fossil used to date other fossils - lived a short time, abundant and geologically widespread index fossil
water fossils aquatic
traces or evidence of once living organisms fossil
the type of rock where fossils are usually found (formed by compression and cementation) sedimentary rock
Created by: aderrick
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