Argiles d'lignite du Soissonnais
| Argiles d'lignite du Soissonnais | |
|---|---|
| Stratigraphic range: Ypresian ~ | |
| Type | Formation |
| Underlies | Oise River Quaternary sediments |
| Overlies | Thanetian marine green sands |
| Lithology | |
| Primary | Sandstone |
| Other | Lignite, amber |
| Location | |
| Coordinates | 49°18′N 2°42′E / 49.3°N 2.7°E |
| Approximate paleocoordinates | 44°48′N 0°00′E / 44.8°N 0.0°E |
| Region | Oise |
| Country |  France |
| Type section | |
| Named for | Soissonnais |
  Argiles d'lignite du Soissonnais (France) | |
The Argiles d'lignite du Soissonnais is a geologic formation in the Oise department of northern France. The formation has provided fossil mammals, reptiles and fish as well as arthropods in the amber of the formation. The Argiles d'lignite du Soissonnais dates back to the Ypresian stage of the Eocene period.[1]
Description
The formation comprises a succession of lenticular bodies showing two main facies; clayey sands rich in frequently pyritised lignite, together with amber and grey clayey sands with less lignite (1 to 12 % of the sediment), with continental vertebrate fauna. These facies, the rarity of mollusk shells and charophytes, probably due to decarbonatation and the presence of pyrrhotite (FeS4), reflect a hypoxic environment.
The strata were deposited at the bottom of two channels cutting into underlying Thanetian marine green sands. The channels prograde toward the northeast and were discovered under Oise River Quaternary deposits.
Fossil content
The formation has provided among others the following fossils:[1]
Mammals
- Primates
- Artiodactyls
- Cimolesta
- Eutheria
- Ferae
- Hyaenodonta
- Macroscelidea
- Multituberculata
- Perissodactyls
- Placentalia
- Rodents
- Soricomorpha
- Theriiformes
Reptiles
- Turtles
- Crocodiles
- Lizards
- Snakes
Amphibians
Fish
- Anomotodon novus[2]
- Isurolamna inflata[2]
- Lepisosteus fimbriatus[2]
- Otodus obliquus[2]
- Pachygaleus lefevrei[2]
- Palaeogaleus vincenti[2]
- Palaeohypotodus rutoti[2]
- Squalus orpiensis[2]
- Striatolamia striata[2]
- Cyclurus sp.[2]
- Heterodontus sp.[2]
- Myliobatis sp.[2]
- Notorynchus sp.[2]
- Squatina sp.[2]
- Percoidei indet.[2]
Arthropods
- Diptera
Pancrustacea
Flora
See also
- List of fossiliferous stratigraphic units in France
- Ypresian formations
- Ieper Group of Belgium
- Fur Formation of Denmark
- London Clay Formation of England
- Silveirinha Formation of Portugal
- Wasatchian formations
- Nanjemoy Formation of the eastern United States
- Wasatch Formation of the western United States
- Itaboraian formations
- Itaboraí Formation of Brazil
- Laguna del Hunco Formation of Argentina
References
- ^ a b Argiles d'lignite du Soissonnais at Fossilworks.org
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt Nel et al., 1999
- ^ Solé et al., 2013a
- ^ Solé et al., 2013b
- ^ Bronnert et al., 2019
- ^ Nel, 2006
- ^ Oise amber at Fossilworks.org