Loc. 5, Brunswick Peninsula [Rio Blanco Fm] (Cretaceous of Chile)

Where: Chile (53.5° S, 71.4° W: paleocoordinates 55.5° S, 61.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rio Blanco Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Rio Blanco Fm, which regionally overlies the Tres Morros Fm (Maastrichtian), and is overlain by the Carrera Fm (Maastrichtian). AGE: Late Maastrichtian, on the basis of macrofossil and foraminiferal biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

• ENVIRONMENT: Marine siliciclast environment.
• SPECIFIC LITHOLOGY: Not stated in text, but presumably siliciclastic. LITHIFICATION: Lithified, based on figured specimens.

Size classes: macrofossils, microfossils

Preservation: cast, mold/impression, concretion

Collected by Lahsen & Charrier

Collection methods: surface (in situ),

• COLLECTORS: Lahsen and Charrier. REPOSITORY:SGO-PO, Chile.

Primary reference: A. Lahsen and R. Charrier. 1972. Late Cretaceous ammonites from Seno Skyring-Strait of Magellan area, Magallanes Province, Chile. Journal of Paleontology 46(4):520-532 [A. Hendy/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83617: authorized by Austin Hendy, entered by Austin Hendy on 23.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoidea and foraminifera. Said to include bivalvia and gastropoda, but not listed in text. NOMENCLATURE: Authoritative publication, with fairly modern nomenclature, and species resolution identifications.
Cephalopoda
 Ammonitida - Kossmaticeratidae
"Maorites cf. suturalis" = Maorites tenuicostatum Marshall 1917 ammonite
Maorites densicostatus Kilian and Reboul 1909 ammonite
Maorites cf. densicostatus Kilian and Reboul 1909 ammonite
Gunnarites cf. kalika Stolickzka 1865 ammonite
 Ammonitida - Diplomoceratidae