One of the tectonic terranes that make up Connecticut. Terrane boundary defined using the CT GIS Bedrock Geology Map from the CT DEEP. Elevation data from the 1/3 arcsec digital elevation model downloaded from the USGS National Map.
Gaps in the model are for the Waterbury Dome (part of the older Proto-North America terrane) and a sliver of the Newark Basin (younger rifting).