A coarse bioclastic limestone, containing identifiable fragments of crinoids (e.g. top centre) and a massive tabular coral colony (Favosites) in life position. The limestone is crudely bedded.
This cross section through part of unit P21 shows some in situ (in growth position) colonies of reef-building organisms.
Scale: the picture is about 1 metre across
Grid reference: 904
This page is maintained by Roger Suthren
Last Modified: 18 November, 2008