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Notes:
Title supplied by cataloger.
Print in album volume MDWSC, Contract 17, Wachusett-Coldbrook Tunnel, Tunnel West and Shaft 8, Volume 1, Chief Engineer set
Typed on back: Intersecting crush zones. The point of intersection is the lower right center. One extends diagonally downward from the upper left corner, the other more steeply from the upper right. The lower zone dips 30degrees to the west and upper 40degrees to the west. The rock is a schist containing pegmatite. The striae are parallel to the dip and the west (right) side has moved downward.
Notes (acquisition):
Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation