KT section Bajada del Jagüel, Neuquén Basin, BJG_Bpl4 (Paleocene of Argentina)

Where: Neuquén, Argentina (38.1° S, 68.4° W: paleocoordinates 40.6° S, 56.8° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Jagüel Formation (Malargüe Group), Danian (66.0 - 61.6 Ma)

• K/T boundary (top of boundary bed) is at 0 m. Beds lumped over 0.70 m. Data from bed/horizon refers to midpoint of sampled beds.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray, yellow, calcareous mudstone

• mid to outer shelf environment, below normal wave base.

Size classes: macrofossils, mesofossils

Preservation: cast, mold/impression, original calcite, replaced with calcite

Collected by Aberhan, M., Weidemeyer, S. in 2004

Collection methods: bulk, mechanical,

Primary reference: S. Weidemeyer. 2007. Molluscs at the K/Pg boundary in Argentina: Extinction and recovery patterns. unpublished Ph.D. thesis. [W. Kiessling/S. Weidemeyer]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 74006: authorized by Wolfgang Kiessling, entered by Sven Weidemeyer on 16.07.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Echinoid spines and plates and fish fragments were reported but not included.
Anthozoa
 Scleractinia - Flabellidae
Flabellum sp. Lesson 1831 stony coral
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
 Sorbeoconcha - Aporrhaidae
Struthioptera sp. Finlay and Marwick 1937 snail
 Neogastropoda - Fasciolariidae
Cryptorhytis "sp. A" Meek 1876 snail
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
 Arcida - Parallelodontidae
"Nemodon sulcatinus" = Grammatodon (Cosmetodon) sulcatinus
"Nemodon sulcatinus" = Grammatodon (Cosmetodon) sulcatinus Evans and Shumard 1857 clam
 Ostreida - Gryphaeidae
Pycnodonte (Phygraea) burckhardti Bohm 1903 oyster
[entered as Pycnodonte (Phygrea) burckhardti]
 Lucinida - Lucinidae
Pteromyrtea sp. Finlay 1926 clam
 Cardiida - Veneridae
 Carditida - Carditidae
 Nuculanida - Nuculanidae
Nuculana cf. amuriensis pointed nut clam