Where: Landes, France (43.7° N, 1.1° W: paleocoordinates 35.9° N, 0.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Pachydiscus neubergicus ammonoid zone, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• Precise correlation of level E 0 with the main outcrop has been made possible thanks to lithological features. The most significant lithological feature is the presence of a pycnodont-rich bed which is found at level 117.3 (section PIV) and at level 3.2 on section E. This feature is followed by a slightly more clayey horizon 0.5 metre above in both cases. Another feature is the change from pale flint to dark flint in the succession. It is observed at level 131.4 on PIV and at level 19.6 in the E section. The approximately similar interval between these two independent features in sections PIV and E (about 14.1 and 16.4 metres, respectively) make them a reliable criterion for correlation. We have keyed the correlation on the pycnodont bed suggesting that wall E 0 corresponds to level 114.1 in the section on platform IV.

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, cherty/siliceous limestone

Size class: macrofossils

Primary reference: G. S. Odin. 2001. The Campanian-Maastrichtian stage boundary. Development in Palaeontology and Stratigraphy 19:1-881 [L. Villier/L. Villier/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 214224: authorized by Matthew Clapham, entered by Matthew Clapham on 19.09.2020

Creative Commons license: CC BY (attribution)