Abundance of terrestrial palynomorphs of sediment core CRP-1 ...

• Main Author: Raine, J Ian
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: DEPTH, sediment/rock; Aequitriradites sp.; Baculatisporites sp.; Caryophyllaceae; Chenopodipollis sp.; Coptospora sp.; Dacrydiumites praecupressinoides; Dilwynites granulatus; Marchantiaceae; Microcachryidites cf. antarcticus; Nothofagidites asperus; Nothofagidites spp.; Nothofagidites cranwelliae; Nothofagidites flemingii; Nothofagidites cf. flemingii; Nothofagidites lachlaniae; Phyllocladidites mawsonii; Peninsulapollis sp.; Polypodiidites sp.; Podocarpidites spp.; Proteaceae; Trichotomosulcites subgranulatus; Tricolpites sp.; Triporopollenites cf. ambiguus; Triporopollenites sp.; Alisporites spp.; Antulsporites spp.; Asseretospora sp.; cavate spore; Deltoidospora directa; Equisetosporites sp.; Granulatisporites trisinus; Horriditriletes ramosus; Laevigatosporites sp.; Protohaploxypinus sp.; Punctatisporites spp.; Rubinella sp.; Rugulatisporites sp.; Spores, apiculate indeterminate; Pollen, bisaccate; Core wireline system; Counting, palynology; CRP-1; Sampling/drilling ice; Cape Roberts Project CRP; Antarc*; Antarctic; Antarctica; antarcticus; antartic*; Ross Sea; Tundra
• Online Access: https://dx.doi.org/10.1594/pangaea.54784; https://doi.pangaea.de/10.1594/PANGAEA.54784

Sparse pollen and spores from the lower Miocene section of CRP-1 derive from at least three sources. A low-diversity but persitent angiosperm-moss-liverwort assemblage may reflect contemporaneous herb-moss tundra and a climate with summer temperatures similar to that of islands in the vicinity of the Antarctic Convergence today. More diverse Nothofagus-podocarp-Proteaceae assemblages at c. 70 mbsf and 100- 116 mbsf may rcflect woody vegetation growing nearby in warmer sites or periods, long distance transport, or redeposition from older strata. A contemporaneous local origin is preferred: although it is not possible to determine the precise form of this vegetation from palynological data, a conservative model with low-growing shrubs would imply July mean temperatures of at least 7°C. Reworked Permian-Triassic miospores are present in low numbers throughout the sequence. Pleistocene samples contain assemblages likely to have been reworked from older strata, mostly having similar taxa to the lower Miocene ... : Supplement to: Raine, J Ian (1998): Terrestrial palynomorphs from Cape Roberts Project drillhole CRP-1, Ross Sea, Antarctica. Terra Antartica, 5(3), 539-548 ...