Rippled flint, but how and why?

[thelivingdead531]

Hey, hey, hey! I’ve had this chuck of flint for nearly 3 years and have always forgotten to ask about it here. I’m fairly certain I picked it up on the beach in Happisburgh, England. It’s almost 10cm long and 6cm wide. It has 4 depressions that give it a ripple-like effect. I had tried to search rippled flint but didn’t get far at all. I’ve seen flint do all sorts of weird and interesting things, but I haven’t seen this before. What could be the cause for this? It reminds me of the ancient sea floor impressions I’ve seen, though I doubt that’s the case for this one.

 

[TqB]

Flint often presents weird and wonderful pseudofossils but I think that's probably an internal mould of part of a large inoceramid bivalve such as Inoceramus lamarcki.

 

Happisburgh is a feasible location.

Edited December 20, 2021 by TqB

[thelivingdead531]

11 hours ago, TqB said:

Flint often presents weird and wonderful pseudofossils but I think that's probably an internal mould of part of a large inoceramid bivalve such as Inoceramus lamarcki.

 

Happisburgh is a feasible location.

Oh wow, I never would have guessed that. Thank for your help and information!