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The eugeosynclinal rocks of western Massachusetts and western Connecticut are devoid of fossils and, except for the Goshen Formation and parts of the Straits Schist, contain relatively few reliable primary tops data. Local stratigraphic sequences have been developed, but tracing these sequences over large areas has been complicated by stratigraphic facies changes, complex structures, and conflicting geologic interpretations. Inasmuch as the relative age of any one unit within a sequence rarely can be determined reliably by internal information, we have chosen to rely heavily on lithic correlations of the stratigraphic sequences in western Connecticut and southernmost Massachusetts with the better established sequences of northern Massachusetts and southeastern Vermont. As discussants of the papers in this volume by Schnabel, Gates and Martin, and L. M. Hall on western Massachusetts and Connecticut, we wish to briefly outline a f ew points on which we either strongly disagree or believe that the evidence is such that other interpretations should be considered. For purposes of this discussion, we have outlined on Figure 1 the study area in Massachusetts, as well as Schnabel's, Gates and Martin's, and L. M. Hall's study areas, and the Collinsville area.

It should also be noted that the interpretations presented here, which appear in considerably greater detail elsewhere (Hatch and Stanley, 1974), differ markedly from those given earlier by Hatch and others (1968). This change in interpretation results from completion of detailed mapping in all of the pre-Silurian rocks and most of the Silurian and Devonian rocks in the western...

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