Passaic Formation from the Newark rift basin.TOP: Mostly red Passaic Formation from Lyndhurst, New Jersey. BOTTOM: Alternating massive and fissile siltstone and shale exposed in Fall 2018 in Blooming Glen Quarry in Perkasie, PA. Thin, non-red unit is present at top cut. Massive units contain numerous joints with plumose markings. Photo by R.W. Schlische.