Ekelöf Point - Rabot Member of Santa Marta Formation - DJ.294.4 (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 150962: 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
  -
? Isabelidium "sp.", Pheludinium kozlowskii
Dinophyceae
  -
Spiniferites "sp."
Spiniferites "sp." Mantell 1850
 Peridiniales - Protoperidiniaceae
Phelodinium magnificum
Phelodinium magnificum Stover and Evitt 1978
 Peridiniales - Peridiniaceae
Cerodinium diebelii, Isabelidinium cf. ponticum, Isabelidinium papillum, Isabelidinium cretaceum, Isabelidinium pellucidum
Cerodinium diebelii Lentin and Williams 1987
Isabelidinium cretaceum Lentin and Williams 1977
Isabelidinium pellucidum Lentin and Williams 1977
 Gonyaulacales - Gonyaulacaceae
Oligosphaeridium "sp. A", Oligosphaeridium complex
Oligosphaeridium "sp. A" Davey and Williams 1966
Oligosphaeridium complex Davey and Williams 1966
 Gonyaulacales - Ceratiaceae
Odontochitina operculata
Odontochitina operculata Deflandre 1935
 Gonyaulacales -
Tanyosphaeridium xanthiopyxides
Tanyosphaeridium xanthiopyxides Stover and Evitt 1978