Simplified Geology of Humber Region 38.

As one moves west across the Humber Region the bedrocks get older, therefore the bedrock of Wallingfen and the eastern Vale of York and Vale of Trent was laid-down in the Triassic geological period between roughly 250 and 200 million years ago. This geological period followed the largest mass extinction of flora and fauna known to have happened in the history of the Earth. However biodiversity increased again in the Triassic era, this including the earliest dinosaurs. Another mass extinction occured in the Triassic/Jurassic overlap, although the early dinosaurs mostly survived this disaster. The picture above is a late-19th century German impression of Triassic flora (copied from Wikipaedia).
The drift geology of Wallingfen is more a product of it being part of the bed of Lake Humber, a vast inter-glacial lake, and of the humus accumulations that occured prior to drainage. The current Humber Estuary was almost certainly partly, if not mainly, created by the effects of water erosion through this being an overflow channel from Lake Humber.
To complete this section on Wallingfen I shall cover two things, The Hasholme log-boat and, secondly, hemp production of the early drained lands of Wallingfen.
This will then, I think, complete my coverage of this topic for now.