As described in the introduction, the geologic record largely consists of alternations between carbonate domination and the influx of clastic wedges. On stratigraphic evidence alone this is the way orogenic episodes are recognized. Carbonates represent periods of tectonic stability, and the large influxes of clastics indicate a mountain source being eroded. The carbonate rocks at this next stop (8) are sandwiched between clastic wedges of the Taconic and Acadian orogenies and represent a period of tectonic calm. |