Zion national park finished - strata, indicating...

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150 million years old. Sandston ee Rock built up past ocean and eroded down to this line. Rocks laid down by water as gravel, sand, or mud. Each layer is younger then the one below it (superposition) Horizontal Strata Disconfromity- the surface of a division between parallel rock
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Unformatted text preview: strata, indicating interruption of sedimentation: a type of unconformity. Frost wedging- the mechanical breaking of rock due to expansion of freezing water in cracks ary rock -chalk, limestone, dolomite, sandstone, conglomerate or shale...
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