Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > New Hampshire
|Name||Gabbro and diabase|
|Geologic age||Middle Ordovician|
|Original map label||Oc9B|
|Comments||Rocks of the Chickwolnepy intrusions in northern New Hampshire (Middle Ordovician).|
|Primary rock type||gabbro|
|Secondary rock type||diabase|
|Other rock types|
Igneous > Volcanic > Mafic-volcanic > Basalt (Diabase)Foliated to nonfoliated and coarse- to fine-grained; includes mafic dikes tentatively correlated with Chickwolnepy intrusions.
Igneous > Plutonic > Gabbroic > GabbroFoliated to nonfoliated and coarse- to fine-grained; includes mafic dikes tentatively correlated with Chickwolnepy intrusions.
Bennett, D. S, , Wittkop, C.A., and Dicken, C.L., 2006 , Bedrock Geologic Map of New Hampshire - A Digital Representation of the Lyons and others 1997 map and ancillary files: U.S. Geological Survey Data Series 215, scale 1:250,000, CD-ROM.
Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock Geologic Map of New Hampshire: Reston, VA, U.S. Geological Survey Special Map, 1:250,000, 2 sheets.
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