Coprolites - marine reptiles / sharks.
Palm sized matrix. On the upper surface are 3 coprolites. Most likely from Plesiosaurs or Ichthyosaurs. A little on the large size for most of the sharks around at the time.
Triassic, Rhaetic, Penarth Group, Westbury Formation.
Garden Cliff, Westbury-on-Severn, Gloucestershire.
Specimen : 8 x 8.5 cm.