Geology of New England Geology of New England New England is a region in the North Eastern United States consisting of the states Rhode Island, Connecticut, Massachusetts, New Hampshire, Vermont, and Maine. Most of New England consists geologically of volcanic island arcs that accreted onto the eastern edge of the Laurentian Craton in prehistoric times. Much of the bedrock found in New England is heavily metamorphosed due to the numerous mountain building events that occurred in the region. These events culminated in the formation of Pangaea; the coastline as it exists today was created by rifting during the Jurassic and Cretaceous periods. The most
Geology of Rhode Island Pleistocene glaciations. The state's geology is part of the broader geology of New England. Rhode Island is divided into two distinct physiographic regions. The Eastern Highlands occupy the northwestern interior of the state, near the state line with Connecticut while the majority of the state's land area is grouped with the larger Atlantic Coastal Plain that extends along the eastern seaboard of the US. Rhode Island is the only state in New England formed entirely atop basement rock from the microcontinent Avalonia. The bedrock of Rhode Island first took shape with the emergence of a volcanic arc near a subduction