Río Negro east (12.30 m) (Cretaceous of Argentina)

Where: Río Negro, Argentina (39.1° S, 67.7° W: paleocoordinates 43.2° S, 49.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Late/Upper Cretaceous (100.5 - 66.0 Ma)

• fossils in upper 30 cm of bed

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; poorly lithified, red, white, blue sandstone

• "we have here in this complex group of beds a salt water flora and fauna living at shallow depth"
• "loam and loamy sandstones that are white, red, and dark violet, of easy disaggregation"

Size class: macrofossils

Preservation: replaced with silica

Collected by R. Wichmann in 1912

Collection methods: chemical,

Primary reference: R. Wichmann. 1916. Las capas con dinosaurios en la costa sur del Río Negro, frente a General Roca [The beds with dinosaurs on the south side of the Río Negro, in front of General Roca]. Physis 11:258-262 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 45491: authorized by Matthew Carrano, entered by Matthew Carrano on 25.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
"other large gastropods"
 Sorbeoconcha - Hydrobiidae
Hydrobia sp.
Hydrobia sp. Hartmann 1821 snail
"small" species
Bivalvia
 Cardiida - Corbiculidae
Corbicula sp.
Corbicula sp. Megerle 1811 clam
"different species"
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
"different, as yet undetermined genera"
unclassified
  -
Charophyta indet.
Charophyta indet. Migula 1890
either "Chara or Nitella"