Correlate the layers in the following three stratigraphic columns by drawing lines from the top and bottom of matching formations.What is the oldest sedimentary rock unit in this region? The youngest unit? 
Definitions:
Self Join
A SQL technique where a table is joined to itself to compare rows within the same table or to perform calculations based on its own columns.
Criteria
A standard or rule by which something can be judged or decided.
Form Format View
A view or layout in database or form-building software designed for formatting data entry forms.
Chart Color
The scheme or palette of colors applied to the visual elements of a chart to improve readability or appeal.
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