Composite stratigraphy of the Newark basin derived from the NBCPcores. This diagram shows the color and grain size of the six formations recovered in the NBCP cores, along with their magnetic polarity (normal or reversed) and degree of overlap between pairs of adjacent cores. Members are formal and informal subdivisions of the formations. The top of the Preakness Basalt and the bottom of the Stockton Formation were not recovered in the NBCP cores. From Olsen et al. (1996) and the NBCP website.