Mineral Resource Report, Issue 79Pennsylvania Geological Survey, 1981 - Geology |
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1100 Strong brown 1250 PYROMETRIC CONE 1900 Brownish orange 2.5 Workability Abrupt vitrification ATTITUDE OF BEDDING bedding planes BLAIR COUNTY Bloomsburg Formation breaks to form Bulk density g/cc CENTRE COUNTY CHEMICAL ANALYSIS Chlorite-vermiculite Feldspar Calcite Color F Color Hardness Percent Devonian DESCRIPTION Drying shrinkage fractures and bedding GEOLOGIC UNIT Grayish reddish orange HUNTINGDON COUNTY iron staining Kaolinite Chlorite-vermiculite Feldspar LATITUDE linear Percent LONGITUDE Mahantango Formation Marcellus Formation Mica-smectite Kaolinite Chlorite-vermiculite MINERALOGY X-RAY Munsell Hardness Mohs ND BLOATING TEST ND REMARKS Negative REMARKS Ordovician Percent app Percent F PERRY COUNTY platy fragments PYROMETRIC CONE EQUIVALENT QUADRANGLE LOCATION quarry Quartz Mica-smectite Kaolinite reddish brown 1150 Reedsville shale breaks Shale pit Short Dry strength Short Fair siltstone silty shale Silurian Slight to moderate SLOW-FIRING TESTS smectite SNYDER COUNTY south-central Pennsylvania stratigraphic feet stratigraphic section Strong brown 2.5YR4/6 TiO2 TOWNSHIP SAMPLE NUMBER underclay vermiculite vitrification Water of plasticity WEATHERING INTENSITY Weight