USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Massachusetts

Collinsville Formation

Collinsville Formation - Plagioclase gneiss and minor amphibolite.
StateMassachusetts
NameCollinsville Formation
Geologic ageMiddle Ordovician or older
Original map labelOco
CommentsPart of Bronson Hill Zone (Ordovician and Older Rocks)
Primary rock typegneiss
Secondary rock typeamphibolite
Other rock types
Lithologic constituents
Major
Metamorphic > Gneissplagioclase gneiss
Minor
Metamorphic > Amphibolite
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Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.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.
Geographic coverageFranklin - Hampshire

Show this information as [XML]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MAOco;0
Page Contact Information: Peter Schweitzer