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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: Bands of biotite schist (dark) in more granitic schist (light) dipping 15degrees east. The faint branching structure consists of a greater proportion of feldspar and quartz to biotite. It suggests the fracturing of the original rock which facilitated the entry of the solutions which caused the granitization or syntexis.
Notes (acquisition):
Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation
Notes (publications):
Published in, MDWSC 1935 Annual Report, Appendix, between pp.16-17, plate 10 (top)