The basal parallel-bedded sands and silts of this unit contain abundant but fragmentary carbon compressions and poorly preserved compressed coniferous branches.
The upper half is more heterogeneous and consists of an irregular alternation of clays, silts and finer sands.
Thickness of individual silt beds increases towards the top, while representation of clayey silt layers decreases.
Modification of silt microstructure by hydrocarbon contamination in freezing ground.
The soil texture is silty clay loam with 29, 47, and 24% sand, silt and clay respectively, and illite is the dominant clay mineral.
Conformably overlying the sandstones are approximately 5 m of beige-brown to olive green weathering sands and silts.
In medium-textured soils, such as silts, the conditions discussed above are satisfied.
The soil texture is 46 % sand, 46 % clay and 8 % silt.
