Geological Magazine; January 2008; v. 145; no. 1;
p. 105-147; DOI: 10.1017/S0016756807003925
© Cambridge University Press (CUP)
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Figure 17. Map of the fissures showing the relative abundance of the three common sphenodontids, Clevosaurus, Diphydontosaurus and Planocephalosaurus, based on skeletal elements that can be attributed with certainty (all are skull or lower jaw bones). There is a clear change in the relative abundance of these sphenodontids from west to east across the quarry. The western part of the quarry is bordered by the Lower Limestone Shale Group, and the easterly fissures are furthest away from that stratum and the Old Red Sandstone.
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