Ekelöf Point - Rabot Member of Santa Marta Formation - DJ.294.9 (Cretaceous to of Antarctica)

Where: Antarctica (64.2° S, 57.2° W: paleocoordinates 62.1° S, 68.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Rabot Member (Santa Marta Formation), Campanian to Campanian (83.6 - 66.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, massive, gray, muddy, silty mudstone and lithified, fine-grained, medium tuff

• Samples DJ.294.1-6 have a relatively high gonyaulacacean ratio accompanied by lower dominance, suggestingrelatively offshore conditions. Samples DJ.294.7-12 record a progressively reducing gonyaulacacean ratio and rising dominance values which may indicate a gradual reduction in distance from shore. There follows a

•return to relatively offshore characteristics from DJ.294.13-17.

• The sampled exposure at Ekelof Point consists of 34.5 m of massive to weakly laminated, grey, silty mudstones, punctuated by several beds (up to 20 cm thick) of fine to medium grained tuff, largely altered to yellow-grey clay.

Size class: microfossils

• Other: Palynomorphs

Preservation: soft parts, original sporopollenin

Reposited in the BAS

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

Primary reference: P. W. Sumner. 1992. Dinoflagellate cysts from the Rabot Member (Santa Marta Formation) of eastern James Ross Island. Antarctic Science 4(3):305-310 [C. Jaramillo/P. Santamarina]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 150967: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 19.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Pheludinium kozlowskii
Dinophyceae
  -
Spiniferites "spp."
Spiniferites "spp." Mantell 1850
 Peridiniales - Protoperidiniaceae
Phelodinium magnificum
Phelodinium magnificum Stover and Evitt 1978
 Peridiniales - Peridiniaceae
? Isabelidinium "sp.", Isabelidinium cf. ponticum, Isabelidinium papillum, Isabelidinium cretaceum
? Isabelidinium "sp." Lentin and Williams 1977
Isabelidinium cretaceum Lentin and Williams 1977
 Gonyaulacales - Gonyaulacaceae
Nematosphaeropsis densiradiata, Oligosphaeridium "sp. A"
Nematosphaeropsis densiradiata Stover and Evitt 1978
Oligosphaeridium "sp. A" Davey and Williams 1966
 Gonyaulacales - Ceratiaceae
Odontochitina operculata
Odontochitina operculata Deflandre 1935
 Gonyaulacales -
Tanyosphaeridium xanthiopyxides
Tanyosphaeridium xanthiopyxides Stover and Evitt 1978