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Tertiary sediments

Tertiary sediments - Unconsolidated sand, silt, and clay in discontinuous patches; contains Tertiary fossils; may include Pleistocene sediments (cross section only).
State Massachusetts
Name Tertiary sediments
Geologic age Tertiary
Comments Part of Milford-Dedham Zone (Tertiary and Older Rocks)
Primary rock type sand
Secondary rock type silt
Other rock types clay or mud
Lithologic constituents
Map references
Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.
Unit references
Zen, E-An (ed.), Goldsmith, R. (comp.), Ratcliffe, N.M. (comp.), Robinson, P. (comp.), Stanley, R.S. (comp.), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., Wones, D.R., 1983, Bedrock Geologic Map of Massachusetts: U.S. Geological Survey, Reston, VA, scale 1: 250,000.