Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Maine
|Name||Devonian - Silurian Castine Formation|
|Geologic age||Devonian - Silurian|
|Original map label||DSca|
|Comments||Named for Castine Peninsula, Hancock Co., south-central ME. Consists of light-colored, altered lavas and pyroclastics, including rhyolites, dacites, and andesites. Relations indicate that Castine formation, Islesboro formation, and North Haven greenstone are nearly contemporaneous. (ME025) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies; Protolith E - Mafic to felsic volcanic rocks|
|Primary rock type||mafic volcanic rock|
|Secondary rock type||felsic volcanic rock|
|Other rock types|
Igneous > Volcanic > Mafic-volcanicGS - Greenschist facies; Protolith E - Mafic to felsic volcanic rocks
Igneous > Volcanic > Felsic-volcanicGS - Greenschist facies; Protolith E - Mafic to felsic 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.
|Geographic coverage||Hancock - Knox|
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