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Aix-en-Provence (collection of Count de Saporta) (Oligocene of France)

Where: Bouches-Du-Rhone, France (43.5° N, 5.5° E: paleocoordinates 43.3° N, 2.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Niveau du gypse d'Aix Formation, Chattian (28.4 - 23.0 Ma)

• "The ‘insect formation’ is 2.5 m thick, divided in two parts that correspond to two very different environmental conditions. The first (lower) episode is remarkable by its lateral monotony of facies on a distance of 6 km at least, in the outcrops observed on the northwest of Aix-en-Provence. This lower episode is distinguished from the rest of the ‘insect formation’ and from the whole formation of Aix-en-Provence by the presence of a very numerous thin limestone laminae. The second (upper) episode is remarkable by the presence of many silici- fied laminae. The fauna in this level is also very well preserved"….This collection consists of unspecified layers

Environment/lithology: lacustrine - large; lithified limestone

• This lacustrine formation was deposited in a very large but shallow-water lake, with variable salinity and near the marine coast (Nury 1990, Nury & Thomassin 1994). Irregular basins formed during extension of the European platform in the Oligocene resulting from the formation of the West-European rift system.
• The deposit presents an alternation of limestone and marls with gypsum.

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected by Count Gaston de Saporta in <1828; reposited in the MNHN

• Acquired by M. de Saporta in a gypsum quarry in the vicinity of Aix.

Primary reference: J. B. A. Boisduval. 1840. Sur une empreinte de Lepidoptère trouvée dans les marnes des environs d'Aix, en Provence, et communiquée par M. de Saporta. Annales de la Société Entomologique de France 9:371-374 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123943: authorized by Matthew Clapham, entered by Matthew Clapham on 02.02.2012

Creative Commons license: CC BY (attribution)