~230 million years ago the UK was a harsh environment in the middle of the supercontinent of Pangea. Storms over mountains to the west caused flash floods, eroding sediment onto a river floodplain. Today these form rocks of the St Bees Sandstone exposed at Fleswick Bay, Cumbria.

Triassic-age riverine sediments in the UK are often lumped together as 'New Red Sandstone', and overshadowed by fossil-rich marine rocks from the Jurassic and Cretaceous periods. Because they don't contain obvious age-diagnostic fossils, and they mostly all look the same..

..but these rocks are packed with beautiful sedimentary structures (cross-bedding) that show the current-direction and even depth of meandering >200 Myr old Pangean river channels.

David was clearly a big fan of Triassic fluvial sedimentology (in 1989).

Although the St Bees lives up to its 'New Red Sandstone' reputation of being unfossiliferous sand, perhaps life did find a way to leave evidence of animals burrowing through the Triassic floodplain? What do you think @fossiliam..?