Science - Ch 7 Section 2

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Author:
codymcc
ID:
128313
Filename:
Science - Ch 7 Section 2
Updated:
2012-01-16 21:08:39
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Science
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  1. the age of a rock compared to the ages of other rocks
    relative age
  2. the age of a rock given as the number of years since the rock formed
    absolute age
  3. the geoligic principle that states that in horizontal layers of sedimentary rock, eacher layer is older than the layer above it and younger thatn the layer below it
    law of superposition
  4. an igneous rock layer formed when lava flows onto Earth's surface and hardens
    extrusion
  5. an igneous rock layer formed when magma hardens beneath Earth's surface
    intrusion
  6. a break in a Earth's crust along which rocks move
    fault
  7. fossils of widely distrubuted organisms that lived during a geologically short period
    index fossil
  8. a gap in the geologic record thta shows where rock layers have been lost due to erosion
    unconforminty

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