GeologyRocksGeological Time: Cross Cutting Example
The first rocks were laid down in marine settings...
...laying down a thick sequence of sedimentary rocks.
A granite then intruded into the sedimentary rocks.
The rocks were then tilted and eroded.
More sediment was laid down, again in a marine setting...
...it is not known how much was deposited, before a dyke intruded.
The dyke and sedimentary rocks are eroded.
More sediment was deposited, which formed the rock just below today's land surface.
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