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 Date: 2005-02-12 14:51:30Geology of Pennsylvania Geology of New Jersey Metamorphic petrology Metamorphic rock Hornfels Ringing rocks Perkiomen Creek Diabase Hardyston Quartzite Petrology Geography of Pennsylvania Igneous petrology |
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_______UPPER PERKIOMEN CREEK WATERSHED CONSERVATION PLAN_______ Geology The southern half of the Upper Perkiomen Creek watershed is situated within the Newark Basin portion of Triassic Lowland Province, a broad basin wi