Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > West Virginia
|Name||Trenton Group and Black River Group, undivided|
|Original map label||Otbr|
|Comments||Printed map has no indiviual description for this unit and no name, but has individual symbol and color. Only uses brackets to combine Ot and Obr. Otbr is used in digital map, so combined Ot and Obr together and called this the "Trenton Group and Black River Group, undivided". Combined thickness: Northeastern 470-1010 ft, Western 890 ft, Southeastern 665 ft.|
|Primary rock type||limestone|
|Secondary rock type||bentonite|
|Other rock types|
Sedimentary > Carbonate > LimestoneTrenton Group: dark, crystalline, nodular, and argillaceous limestones. Black River Group: predominantly gray aphanitic limestones, with many bioclastic streaks; siliceous in the lower part.
Sedimentary > Clastic > Mudstone > Claystone > BentoniteTrenton Group: with some metabentonite streaks
Digital version of 1968 printed map available from http://wvgis.wvu.edu/data/data.php with the specific data available from http://wvgis.wvu.edu/data/dataset.php?action=search&ID=43
Cardwell, D.H., Erwin, R.B., and Woodward, H.P., 1968 (slightly revised 1986), Geologic Map of West Virginia: West Virginia Geological and Economic Survey, Map 1, East Sheet, scale 1:250,000.
|Geographic coverage||Berkeley - Jefferson - Mercer - Monroe|
Show this information as [XML]