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found this unusual fossil in a pebble, portsmouth, bead length about 30mm, I normally find echinoids but i don't recognise this plasticine imprint, any help apprciated
Ah - another 'string of beads' fossil.
These crop up from time to time, and usually cause a degree of head scratching.
Have a read of this thread
hi Mike yes interesting thread, I note in one of the pics (shown below) it shows a string of beads together with
some clam shell and a row of lines next to the beads, oddly i seem to have similar to these, albeit seperately on different fossils, but all from the same area
my photos are below
just noted small rectangle to right of main rows, which resembles more oddities i have
the only half similar fossil i have to this is the echinoid below which is missing some plates
Some of what you're seeing (the parallel lines) is bivalve shells in cross section - exposing the prismatic structure of the original calcium carbonate.