 it occurs in small rhombic crystals in geodes, frequently associated with turgite in limonite beds, especially in Williams and Saucon townships, Northampton County.  Report of Progress - Σελίδα 46των Geological Survey of Pennsylvania - 1875Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | Geological Survey of Pennsylvania - 1883 - 490 σελίδες
...Boyertown ; Ohlinger dam ; Raudenbush mine. Pyrolusite. — Dr. Genth mentions this mineral as occurring " in small rhombic crystals in geodes, frequently associated with turgite, in limonite beds" in the county, but refers to no special localities. Quartz. — Pure transparent crystals occur from... | |
 | Edward Vincent D'Invilliers - 1883 - 490 σελίδες
...Boyertown ; Ohlinger dam ; Raudenbnsh mine. Pyrolusite. — Dr. Genth mentions this mineral as occurring " in small rhombic crystals in geodes, frequently associated with turgite, in limonite beds" in the county, but refers to no special localities. Quartz. — Pure transparent crystals occur from... | |
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