The lithology largely consists of unconsolidated sand with clay and minor silt components.

[1] The Lithology of the Kirkham member consists of up to 40–50 m of cream or white coloured (originally red coloured) kaolinitic fluvial derived unfossiliferous sand, gravel and pebble beds, possibly with local cementation.

The lithology of the Bees Nest Member consists of interbedded mottled sandy and silty clays of varying colours (green, grey, red and yellow brown), it is 6 m thick in the Bees Nest pit and up to 21 m in the Kenslow Pit.

It represents a low energy aquatic or lacustrine depositional setting The Lithology of the Kenslow Member consists of up to 6 m of massive lacustrine grey coloured clay, with the uppermost parts containing abundant wood fragments preserved as mummifications.

[4] [5] The palynomorph assemblage is dominated by pollen of the genera Picea, Pinus, Tsuga and Sciadopitys, the last of which today is confined to a single species in Japan.