Wallenried WIII.1 (Miocene of Switzerland)

Also known as WIII.I

Where: Fribourg, Switzerland (46.9° N, 7.1° E: paleocoordinates 45.9° N, 6.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: MN 2a mammal zone, Lower Freshwater Molasse Formation, Agenian (23.0 - 20.0 Ma)

• "The outcropping sediments form part of the ‘‘Molasse grise de Lausanne’’ Formation [Lower Freshwater Molasse (USM)] within the ‘‘Plateau Molasse’’ (Becker et al. 2001; Becker 2003) and are attributed to the Agenian [MN 2a] European land mammal age." - Mennecart et al (2016)

Environment/lithology: fine channel fill; fine-grained, sandy marl and sandstone

• The sedimentary architecture of the Wallenried quarry corresponds to a perennial meandering river system, with channel deposits and sandy bedforms dominated by medium to coarse sands and in decreasing granulometry from crevasse channel to floodplain deposits and/or oxbow lakes, with a predominance of fine-grained sediments. The mottled clayey to silty floodplain deposits relate to ephemeral ponds associated with seasonality in water supply.
• Sand and marl pit, the richest fossil localities comprise the base of a channel fill and fine-grained floodplain marls (e.g., WallA, WallE, WI.2, WIII.1).

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve

Primary reference: D. Becker, G. E. Rössner, L. Picot and J.-P. Berger. 2001. Early Miocene ruminants of Wallenried (USM, Aquitanian/Switzerland): sedimentology, biostratigraphy and paleoecology. Eclogae Geologicae Helvetiae 94:547-564 [T. Cleary/T. Cleary]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 203092: authorized by Terri Cleary, entered by Terri Cleary on 25.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• Also reported is "fossil wood" and "fish vertebra".
unclassified
  -
Vertebrata indet. Lamarck 1801
Actinopteri
 Cypriniformes - Cyprinidae
Cyprinidae indet. Rafinesque 1815 carp-like fish
Reptilia
 Squamata - Anguidae
Ophisaurus sp. Daudin 1803 glass lizard
 Crocodylia -
Crocodylia indet. Owen 1842 crocodilian
reported as "Crocodilia" in text
Mammalia
 Placentalia -
Rodentia indet. Bowdich 1821 rodent
 Rodentia - Cricetidae
Cricetidae indet. Fischer von Waldheim 1817 mouse
 Rodentia - Gliridae
Gliridae indet. Muirhead 1819 dormouse
Peridyromys murinus Pomel 1853 dormouse
 Rodentia - Eomyidae
Eomyidae indet. Winge 1887 rodent
 Placentalia -
Lagomorpha indet. Brandt 1885 placental
 Lagomorpha - Ochotonidae
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
 Stylommatophora - Limacidae
Limacidae indet. Lamarck 1801 slug
 Stylommatophora - Helicidae
Helicidae indet. Rafinesque 1815 slug