Sedimentation and paleoecology of the Devonian Escuminac Formation and related strata, Escuminac bay, Quebec
Sedimentation and paleoecology of the Devonian Escuminac Formation and related strata, Escuminac bay, Quebec (in Late Paleozoic and Mesozoic continental sedimentation, northeastern North America, symposium)
Special Paper - Geological Society of America (1968) 106: 241-264
Stratigraphy revision in this area retains the Escuminac and Fleurant Formations within the Upper Devonian; the unconformably underlying Pirate Cove Formation is regarded as Lower or Middle Devonian. Sediments of all three were deposited in a complex of alluvial fans, flood plains, river channels and lakes. The Pirate Cove, with angular limestone-clast 'fanglomerates', channeled and ripple-bedded sandstones and shales, is transitional into underlying 'Gaspe Sandstones'. In contrast, the Fleurant, a mixed roundstone conglomerate, is associated with the overlying Escuminac fish-bearing beds. The Escuminac Formation comprises alternating thin sandstones and shale units with both varved and pyritiferous horizons. A fresh- to brackish-water lacustrine regime is suggested, with periodic turbid currents, and a unimodal current pattern from east to west.