ME(1)-8, Manzano Escondido, Sierra Vaca Muerta (Jurassic of Argentina)

Where: Neuquen, Argentina (38.6° S, 70.2° W: paleocoordinates 35.9° S, 31.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Patagoniense ammonoid zone, Lotena Formation, Late/Upper Callovian (164.7 - 161.2 Ma)

• 0.20 m bed of nodular greenish gray marl in nodules, yellow weathered.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, nodular, gray, green marl

Size class: macrofossils

Preservation: cast, replaced with limonite

Primary reference: H. Parent. 2006. Oxfordian and late Callovian ammonite faunas and biostratigraphy of the Neuquen-Mendoza and Tarapaca Basins (Jurassic, Ammonoidea, Western South-America). Boletin del Instituto de Fisiografia y Geologia 76(1-2):1-70 [J. Alroy/J. Martinelli]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 158522: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Parkinsoniidae
 Ammonitida - Perisphinctidae
Perisphinctidae indet. Steinmann 1890 ammonite
 Ammonitida - Sphaeroceratidae
Eurycephalitinae indet. Thierry 1976 ammonite
 Ammonitida - Lytoceratidae
Lytoceratidae indet. Neumayr 1875 ammonite
 Ammonitida - Aspidoceratidae
Peltoceras cf. convexum Hillebrandt 1995 ammonite
 Ammonitida - Oppeliidae
Hecticoceratinae indet. Spath 1925 ammonite
Hecticoceras (Sublunuloceras) cf. virguloides Gerard and Contaut 1936 ammonite
"Hecticoceras (Sublunuloceras) cf. lairense" = Hecticoceras lairense Waagen 1875 ammonite
? Concavites sp. Jeannet 1951 ammonite
 Lucinida - Lucinidae
"Lucina" sp. Bruguière 1797 clam