Border-Fault Conglomerate

Conglomerates at Pebble Bluff in the Newark rift basin near Milford, NJ. The conglomerates were deposited on an alluvial fan on the downthrown side of the border fault of the basin. Streams flowing off the uplifted footwall block deposited their coarse-grained loads on the alluvial fans. Such deposits are sometimes called border-fault fanglomerates. The strata dip toward the left, i.e., toward the border fault. This is one of stops on the Newark basin field trip. Photo credit: Roy W. Schlische.