Oolitic limestone thin section slide exhibiting textbook ooid grains, some with a clear nucleus and concentric calcareous layers. These layers were formed around sand grains or shell fragments that were rolled around in lagoons or on a shallow sub tropical sea floor, gathering layers of carbonate. These microscope slides supplement the hand specimens nicely and allow for a more detailed view of the ooid grains and an opportunity to intepret the diagenetic history of the rock, perfect for educational use. This material was collected from Mid Jurassic strata in Gloucestershire. The slides are 30 microns thick and measure 46 x 27 mm in size and have a cover slip of the section along with a protective cardboard sleeve.
