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        Wissahickon Schist, commonly called Chestnut Hill Stone is a very old, historical stone which dates to the Ordovician period, some 550 million years ago. It is so old, that it contains no fossils. It is a metamorphic rock, which means â??undergoing a changeâ??. It was originally gravel on the sea floor which then underwent vast pressure when volcanic action moved it upward to form a mountain range.
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        General Contractors

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        Phone: (215) 887-3330

        Address: 1A Waverly Rd, Glenside, PA 19038

        Website: website

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