Geologic data obtained from core samples drilled in the vicinity of Chaplin, Windham County, Connecticut

During the summer of 1966, a rotary—drill rig and crew were made available for 2 weeks to the U.S. Geological Survey for use specifically in eastern Connecticut. I was able to take advantage of this opportunity and proposed to investigate two geologic problems that had arisen in the vicinity of Chaplin, Conn., as a result of mapping by H. R. Dixon in the Hampton quadrangle (Dixon and Pessl, 1966) and by G. L. Snyder in his reconnaissance of the W-adjacent Spring Rill quadrangle (Snyder, written commun., 19661. (See figure 1 for the conflicting interpretation along the border of the quadrangle.)