 | | 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... Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville ; Philadelphia:...Philadelphia: Fairmount Park, Frankford, and Rit- enhouse quarry. SCOLECITE CaAl 2 Si3 Oi .3H 2 O MONOCLINIC |  | | Journal (article/letter/editorial) | | Mineral Localities of Philadelphia and Vicinity Author(s): Theodore D. Rand, William W. Jefferis and...org/terms 174 PROCEEDINGS OF THE ACADEMY OF [1892. MINERAL LOCALITIES OF PHILADELPHIA AND VICINITY. BY THEODORE...Philadelphia has long been famned for the number of its mineral localities and the remarkable abundance and variety...large part of Philadelphia is covered with the Delaware River gravels and clays, but most of the streams...about two miles up stream to Fairmount, whose bold hill is composed of a gneiss which apparently rises |
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