Route 114A (Rhode Island–Massachusetts) Island, where it ends back at Route 114, which is overlapped with U.S. Route 1A (US 1A) at this point in East Providence. This is the only instance in Massachusetts of an "A" or "alternate" route carrying the numerics for a highway signed in another state, as Massachusetts Route 114 is over away, running between Lawrence and Marblehead. Three other such instances of this exist in New England. One is in New Hampshire, where New Hampshire Route 113B is actually a loop off Maine State Route 113. The other two are in Vermont, where Vermont Route 10A is a continuation
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