 | | Report (issue) | | DESCRIPTIVE MINERALOGY OF PENNSYLVANIA 104 Na 2Al 2 Si3 Oi .2H 2 O; SiO 2 47.4, A1 2 O 3 26.8, Na...Na 2 O 16.3, Lenni, Delaware County. Crystals. Eyerman, 1911, 11. Composition: Analysis: Fe 2 O3 CaO...Sp.gr LOCALITIES: Berks County: Birdsboro, and Gickerville; Delaware County: Leiperville, Lenni (druses...colorless crystals), Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville...cut east of Reading (probably Birdsboro), Berks County. White, Smith, 1910, 540. silky mass of radiating |  | | Journal (article/letter/editorial) | | MINERAL ISOGRADS IN SOUTHEASTERN PENNSYLVANIA Hucn McKrNSrRy, H araaril IJniaersity, Cambrid.ge, M...covered by the Philadelphia and Coatesville-West Chester Folios showing reported and observed occurrences..., Structural and petrologic studies in Duchess County, New York, Pt. II: G. S. A. Bulletin,47,775-850...8 . 874 MINERAL ISOGRADS IN SOUTHEASTERN PENNSYLVANIA 875 metamorphism: in the Piedmont region and...miles in the extreme southr:astern corner of Pennsylvania and includes most of the area covered by the |  | | Report (issue) | | with minuteness to point out the soils of each township, the facilities for settling and the great prosperity...useful mineral deposits of limited districts, as a county or other convenient area, special attention being...observed in any INFORMATION SOUGHT. 25 one county, and to connect them with those seen in neighboring...the Arkansas border, from and including Stoddard county to Taney, was hardly touched. There are seven counties...are also given. distribution wide, merely to the county. As a farther help there has been appended a |
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