The Cambrian to Lower Ordovician stratigraphic sequencein northwestern Vermont outcrops in a north-south trending beltbordered on the east by the Green Mountain anticlinorium and on the west by deformed Middle Ordovician shales. Significantfacies changes, both parallel and perpendicular to depositionalstrike, can be observed between Burlington and U.S. 2, 8 mi (13 km) to the north (Fig. 1). Stops 1 to 5 in the Lower Cambrian Dunham Dolomite, Middle Cambrian Monkton Quartzite, and Winooski Dolomite are located on a 3 mi (5 km) west-to-eastseries of outcrops along U.S. 2 near Milton, starting in an abandonedquarry on the north side of...