Brownstone has been quarried here since the 18th century, with a production peak in the 1880's when this quarry supplied stone for hundreds of buildings in NYC and many other places. Closed since the 1930's, a section has been reopened recently by a small company that supplies stone for renovations and new buildings. Tracks from this quarry adorn the interior walls near the Science Library at Wesleyan University. Head east on Rte 66 to Rte 17, then north about a mile or so. Portland golf course conglomerate.
Similar features are common in the Basin and Range province out west.
We can study the cobbles to determine what rock units made up the surface geology at that time, and some of the rock types are no longer present in the region. Back to Middletown, north on Rte 9, exit onto Rte 372. 372 roadcut between Rtes. This is the East Berlin formation again, but here you can see the contact with the overlying Hampden basalt, the youngest of the lava flows. Dinosaur tracks have been found in loose boulders along the road bank, but the highway dept.