Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Maine
|Name||Silurian greenstone rocks of the Fivemile Brook sequence|
|Original map label||Sfmg|
|Comments||The informal greenstone member, mostly in the lower part of the formation, consists of a 0 to 1,000 m interval of andesitic igneous rocks which form sills, flows, and pyroclastic layers. An upper lentil of andesitic(?) volcanics is suggested by magnetic anomalies, although no outcrops have been seen. (ME038) Unit description from USGS GEOLEX website (ME078). W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith V - Basaltic volcanic rocks|
|Primary rock type||greenstone|
|Secondary rock type|
|Other rock types|
Metamorphic > Metaigneous > GreenstoneW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith V - Basaltic volcanic rocks
Digital bedrock data downloaded from Maine Office of GIS in September 2005 from http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock Bedrock units table (publication date 11/15/2002) downloaded from same site. Permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006.
Osberg, P. H., Hussey, A.M., and Boone, G. M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.
Show this information as [XML]