Late Albian - Early Cenomanian
The coral reef (MP 13) is about 19 m thick and
primarily composed of medium- to large-sized massive corals and sparsely distributed, medium- to large-sized phaceloid and ramose corals. Non-coral taxa found within this bed
include abundant Pecten roemeri Hill, 1889, Radiolites cf. R. costata Scott, 1990, large nerineids, Mexicaprina alata Filkorn, 2002a, and massive colonies of the stromatoporoid
Actinostromaria sp.