Geologic map of the Newark basin. This map shows the distribution of Triassic- and Jurassic-age rock units (formations) within the Newark basin of New Jersey, Pennsylvania, and New York. NYC is New York City. The faults bounding and within the basin are the black lines. Click on the map above to see a larger version of this map. Modified from Schlische (1992) and Olsen et al. (1996).