The Glauconitic Sandstone attains a thickness of over 30 m in the Hoadley area and was deposited in a NE-SW trending belt over 150 km long and up to 24 km wide. The depositional model generally accepted is that of a shoreline system.

Core descriptions and log correlations in the Westerose South area reveal a complex stratigraphy. The Glauconitic Sandstone sequence can be divided in lower and upper units. The lower unit is dominated by lower to middle shoreface sediments and is bound at the top by a transgressive surface. The upper unit includes several shallowing upward sequences capped by coal.

The shoreline system is cut by sandstone filled channels. In previous publications, these channel sandstones were interpreted to be tidally influenced and were thought to be of the same age as the shoreline sediments. The stratigraphic position of the upper surface of the channel sandstones in the study area suggests that the channels are younger than the shoreline system. They are related to the system of coastal plain sediments that is overlies the Glauconitic Sandstone in the Hoadley area.