Block of Fordham Gneiss - The American Museum journal (c1900-(1918)) (18133027776)

Title: The American Museum journal
Identifier: americanmuseumjo06amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing Before Image:
MAN HA TTAN ISLAND ROCKS 7 schists, the general trend ("strike") of which is N.N.E.-S.S.W. These rocks can be studied in almost every excavation for build- ing purposes, and there are numerous excellent exposures of them, which fortunately will never be covered, in Central, Riverside and Morningside Parks and along the Speedway and
Text Appearing After Image:
MICACEOUS GNEISS A block of Fordham Gneiss (Archaean) from the east end of Washington Bridge, N. Y. Closely resembles the gneiss of Manhattan Island. Specimen is 20 inches across. Lafayette Boulevard. The area of serpentine is very small and is now inaccessible on account of buildings. It is at Tenth Ave- nue and West Fifty-eighth Street. The magnesian limestone, or dolomite, occurs in zones in Harlem, where it is now almost covered with buildings, and in the Kingsbridge section of the island, where a good exposure may be seen along the Spuyten Duyvil ship-canal. The exact distribution of these rocks can best be learned from a study of the geological map of New York City and vicinity

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