Little Barton Strand sole structures

Spectacular sole structures - scours, ripples, grooves, etc. - on the inverted (upside-down) base of a turbidite sandstone slab in the Crackington Formation at Little Barton Strand, near Crackington Haven, north Cornwall. The palaeo-current direction in this photo was from bottom to top, which on restoration of the slab to its original non-inverted state, corresponds to a palaeo-current and a sediment derivation from the south.

A full explanation of the structures and what they can tell us can be found here:
www.ipernity.com/doc/earthwatcher/39023846