Report of Progress ...Board of Commissioners for the Second Geological Survey, 1885 35 vols. are atlases. |
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atlas Avendale bedding belt bowlders Brandywine Summit Bryn Mawr Castle Rock Chester and Philadelphia Chester county Chester creek clay cleavage coal colored geological county Crum creek crystals Darby creek Delaware county deposits east Edgmont township Enstatite escarpments feldspar feldspathic feldspathic gneiss Ferric oxide Ferruginous conglomerate garnet garnetiferous geological county maps Glen Mills gneiss is exposed gravel gray granitic Green's creek HELIOTYPE PRINTING hornblendic hornblendic gneiss Kaoline land Laurentian Lenni limestone locality Marple township mica mica schist Middletown Newtown north-east northern numerous exposures Orthoclase outcrops Palmer's Mills Philadelphia pike Plate portion postage $0 Price $0 quarry Radnor township railroad Report Ridley creek road leading rock exposed schistose schistose gneiss schistose rocks schists schists and gneisses SECOND GEOL sections serpentine sheets short distance north-west short distance south short distance west small area south township south township line south-east corner south-west southern steatite syenite Upper Providence vicinity West Branch West Chester