The image below illustrates the stratigraphic column of the…
The image below illustrates the stratigraphic column of the western interior during the Cambrian period (~540-480 Mya). How did the landscape change over the time period recorded in this sequence?Note: The Bright Angel Fm is shale; the Supramuav is limestone; Tapeats is a medium-grained, thin-bedded sandstone. The numbers represent thickness-you can ignore them.
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