Point Lookout Sandstone
The Point Lookout Sandstone is a Cretaceous bedrock formation occurring in New Mexico and Colorado.
Description
The formation consists of two informal members. The lower is a sequence of thinly bedded sandstone and shale, while the upper is a massive medium- to fine-grained cross-bedded sandstone, light gray to buff in color, that is a conspicuous cliff-forming unit. Maximum thickness is.The lower contact is placed at the first thin sandstone bed above the shale of the Mancos Shale. The formation is overlain by the Menefee Formation.
The Point Lookout Sandstone was deposited in the Cretaceous Interior Seaway, as part of a regressive sequence as the seaway was receding. It is transitional between the marine environment of the underlying Mancos and the coastal plain environment of the overlying Menefee Formation.
Fossils
Dinosaur remains are among the fossils that have been recovered from the formation, including a well preserved maniraptoran feather, although none have yet been referred to a specific genus.The ammonite Clioscaphites vermiformis was identified in the formation.