Desiccation cracks which are infilled by fine sandstone are also found. The sandstones are fine-grained and mainly tabular, indicating that deposition of these sandstones was in a low-energy fluvial environment. The sandstones are capped in the upper sections of the biozone with mudstone clast conglomerates.
The presence of desiccation cracks filled with fine sandstone, along with the fine-grained and tabular nature of these sandstones, points to a low-energy fluvial environment for their deposition. The presence of mudstone clast conglomerates at the top of the biozone further supports this interpretation.