(Table 1) Stratigraphical distribution of Cenozoic terrestrial palynomorphs from sediment core CRP-3, supplement to: Raine, J Ian; Askin, R A (2001): Terrestrial palynology of Cape Roberts Project drillhole CRP-3, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 389-400

• Main Authors: Raine, J Ian, Askin, R A
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2001
• Subjects: DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Asteraceae; Campanulaceae; Caryophyllaceae; Chenopodipollis sp.; Cophosfora spp.; Cyathidites minor; Cyperaceaepollis sp.; Dilwynites granulatus; Laevigatosporites spp.; Lycopodiumsporites sp.; Microcachrydites antarcticus; Myricipites harrisii; Myrtaceidites sp.; Nothofagidites asperus; Nothofagidites flemingii; Nothofagidites cf. flemingii; Nothofagidites lachlaniae; Nothofagidites spp.; Aggregates; Podcarpidites cf. exiguus; Podcarpidites sp.; Podcarpidites spp.; Proteacidites sp.; Ranunculaceae; Rugulatisporites sp.; Stylidiaceae; Trichotomosulcites subgranulatus; Trichotomosulcites sp.; Tricolpites sp.; Tricolpites spp.; Triporopollenites sp.; Pollen, angiosperm indeterminata; Spores indeterminata; Peninsulapollis cf. gillii; Tricolporites cf. Paenestriatus; Fungal mycelia; Fungal spore indeterminata; Specimen count; Core wireline system; Counting, palynology; CRP-3; Sampling/drilling from ice; Cape Roberts Project CRP; Askin; Cape Roberts; McMurdo Sound; Victoria Land; Antarc*; Antarctica; antarcticus; antartic*
• Online Access: https://dx.doi.org/10.1594/pangaea.183928; https://doi.pangaea.de/10.1594/PANGAEA.183928

Sparse low diversity early Oligocene spore-pollen assemblages above c. 410 mbsf (meters blow sea floor) in CRP-3 are dominated by Nothofagus pollen, and are very similar in composition to those from the lower part of CRP-2A. Anther-derived pollen aggregates, and a Nothofagus leaf at 44.12 mbsf show that the palynomorphs were derived from vegetation growing at the time of deposition. This woody vegetation included several species of Nothofagus and podocarpaceous conifers, a few other angiosperm families, and few cryptogams except for bryophytes, In favourable sites the vegetation may have comprised a low scrub or closed forest intermediate stature and floristic richness between that of the Eocene and the limited vegetation of the late Oligocene to earl Miocene. It may have similar to Nothofagus woodland of the present-day Magellanic region, with summer mean daily temperatures at sea level of c. 10-12° C. More stunted vegetation would have existed in exposed and upland sites. Wetland vegetation appears to have been minor, although Coptospora may in part represent a mire community.Below c. 410 mbsf samples are mostly barren, probably due to non-deposition of fine particles and dilution by high sediment deposition. A meagre but relatively high diversity assemblage at 781.36 mbsf contains Casuarina-type pollen, unknown in the higher CRP sequence in Eocene strata of CIROS-1 and glacial erratics of the McMurdo Sound region. This limited data is consistent with Eocene dating of basal CRP-3 Cenozoic sediments from magnetostratigraphy.