Senyús Unit.
1 m thick disk shaped coral biostrome (lense).
Shallow inner ramp.
Dominant coral genera:
Columnocoenia
Cyathophora
Synastrea
Fungiastrea
Dimorphastrea
No enrustations, no borings.
Abundand shell debris.

Additionally rudist-coral 'gardens' and coral 'banks' are present.