A new amber deposit from the Cretaceous (uppermost Albian-lowermost Cenomanian) of SW France - Archive ouverte HAL Access content directly
Journal Articles Cretaceous Research Year : 2008

A new amber deposit from the Cretaceous (uppermost Albian-lowermost Cenomanian) of SW France

(1) , (1) , , (1) , (1) , (1) , (2) ,
1
2
Vincent Perrichot
Jean-Paul Colin
  • Function : Author
Vincent Girard
  • Function : Author
  • PersonId : 759647
  • IdRef : 169323617
Edwige Masure
  • Function : Author
  • PersonId : 927128
Et Al.
  • Function : Author

Abstract

A Cretaceous amber deposit has recently been discovered in a quarry of Charente-Maritime (southwestern France), at Cadeuil. This paper presents the sedimentary and palaeoenvironmental settings of the uppermost Albian-lowermost Cenomanian series including the amber deposit. A preliminary analysis of the amber samples reveals diverse fossil arthropods (a few mites and at least 20 insect families within 9 orders), as well as numerous micro-organisms, mainly algae and mycelia. A myceloid colony of bacteria, a flagellate algae and four especially well preserved insects are illustrated (Diptera Dolichopodidae, Diptera Chironomidae, Hymenoptera Parasitica, and Heteroptera Tingidae). The abundance of the limnic micro-organisms is discussed in terms of bloom events. Their relative scarcity in almost all the amber pieces containing fossil arthropods is attributed to differences in the origin of resin: production along trunk and branches for amber with arthropods; production by aquatic roots for amber rich in algae. The absence of pollen and spores in amber is attributed to differences in the respective periods of resin and palynomorph production, which may be related to a seasonal climate during the Albian-Cenomanian transition in Western Europe.

Dates and versions

insu-00348011 , version 1 (17-12-2008)

Identifiers

Cite

Didier Neraudeau, Vincent Perrichot, Jean-Paul Colin, Vincent Girard, Bernard Gomez, et al.. A new amber deposit from the Cretaceous (uppermost Albian-lowermost Cenomanian) of SW France. Cretaceous Research, 2008, 29 (5-6), pp.925-929. ⟨10.1016/j.cretres.2008.05.009⟩. ⟨insu-00348011⟩
108 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More