- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
"The Rhaetic section at Newark is described and compared with sections further south. The lower Rhaetic is locally sub-zoned by constant bone-bed horizons. In the south-west of the area a much richer fauna occurs and the zone-fossil Pteria contorta appears lower in the succession. The explanation offered is that a lagoon phase existed in the more northerly district."