Bernard Price Institute for Palaeontological Research
Abstract
Main articleMost palaeontological field workers are familiar with the blue to green shales
and maroon to red mudstones, as well as the fine-grained greenish-blue sandstones,
of the Cynognathus-zone, all these colours contributing to its general patchy
appearance. Heights within the zone can unfortunately not be determined
reliably with the assistance of particular colour sequences, but a conspicuous and
persistent sandstone horizon marks the middle level of the zone. Our knowledge
of the manner in which fossils occur both above and below this horizon is not
satisfactory.Non