Growth phase 4. Indicate as early Thanetian, but should be Selandian.
Bioconstructions within the Usabide and Legunbe
complexes (growth phases 4 and 5) appear as lowrelief, tabular-shaped bodies of variable dimensions.
The former (Usd-1 and Usd-2 in Fig. 2B) are of
relatively small size, being between 5 and 7 m thick and 70 and 110 m laterally
