In New York City, Cameron's Line, a tectonic boundary which shows evidence of extreme compression and thrust faulting, separates the Manhattan Prong with its Middle Proterozoic Fordham Gneiss overlain by C and O allochthonous units on the west, from the allochthonous eugeoclinal Hartland Formation and Ravenswood Granodiorite on the east. The Hartland is mapped in the east Bronx and Queens; the Ravenswood is in Queens, Kings, and lower east Manhattan. All three of these were previously mapped as Brooklyn Gneiss or Brooklyn Injection Gneiss, which should be abandoned.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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