On some Additional Remains of Cestraciont and other Fishes in the Green Gritty Marls, immediately overlying the Red Marls of the Upper Keuper in Warwickshire
So brief a notice on so limited a subject may seem hardly worthy of the Geological Society, but as a supplement to my former paper published in this Journal in 1887 on the section and fossils from the Upper Keuper Sandstone at Shrewley, three miles north-west of Warwick, it may perhaps be acceptable. Immediately below the lowest bed of rock, the best and thickest of the sandstones, about 9 feet of grey and green, coarse, sandy marls succeed, resting on red marls. In these green marls no fossils had been hitherto found, except the tests of Estheria minuta , often in good preservation; but I have now to record the discovery of numerous large and small spines (ichthyodorulites) of cestracionts, besides palatal teeth of Acrodus keuperinus , which are abundant, ganoid fish-scales, and many broken bones, including a fragment of a cranial bone, some of which may belong to fishes and others to labyrinthodonts. These occur in a very thin band of marly, friable, gritty sandstone, full of many small rolled pieces of grit, lying between two beds of green marl; but at a little distance east the same bed is a green marl without any intermixture of sand, containing similar fossils. The entire length of the section exposed is 115 yards: the green marls predominate, but alternate with six thin layers of sandstone, a thicker one coming just below the ‘bottom-rock.’ The total thickness of these strata, between the latter and the underlying red marls, is about 8 or 10 feet;