Marine palynomorph abundance estimates of sediment core CRP-2A (Fig. 2), supplement to: Hannah, Mike J; Wilson, Gary S; Wrenn, John (2000): Oligocene and Miocene marine palynomorphs from CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 503-511

• Main Authors: Hannah, Mike J, Wilson, Graeme, Wrenn, John
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2000
• Subjects: DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Lithologic unit/sequence; Pterospermella sp.; Cymatiosphaera spp.; Tasmanites spp.; Leiosphaeridia spp.; Sigmopollis sp.; Acritarch sp.; Micrhystridium spp.; Stellate acritarch; Leiofusa sp.; Batiacashaera cooperi; Batiacashaera spp.; Lejeunecysta spp.; Lejeunecysta fallax; Paralecaniella indentata; Pterodinium cf. cingulatum; Impagidinium spp.; Lejeunecysta sp.; Paralecaniella sp.; Brigantedinium pynei; Phelodinium cranwelliae; Phelodinium sp.; Lejeunecysta cowiei; Brigantedinium sp.; Microdinium spp.; Batiacasphaera sp.; Pyxidinopsis sp.; Memranilarnacia sp.; Deflandrea sp.; Glaphyrocysta sp.; Spiniferites ramosus; Cleistosphaeridium sp.; Corrudinium spp.; Selenopenphyx sp.; Spiniferites sp.; Thalassiphora pelagica; Valensiella sp.; Pentadinium sp.; Cyclonephelium sp.; Alisocysta sp.; Impagidinium cf.. elegans; Cometodinium sp.; Hystrichosphaeridium cf. patulum; Operculodinium sp.; Enneadocysta partridgei; Alterbidinium distinctum; Vozzhennikovia apertura; Deflandrea antarctica; Spinidinium macmurdoense; Vozzhennikovia cf. apertura; Apectodinium homomorphum; Turbiosphaera filosa; Areosphaeridium sp.; Arachnodinium antarcticum; Alterbidinium cf. distinctum; Hystrichosphaeridium sp.; Alterbidinium cf. asymmetricum; Spinidinium cf. macmurdoense; Alterbidinium asymetricum; Hystrichosphaeridium tubiferum; Foraminifera, linings; Indeterminata; Scolecodonta; Core wireline system; CRP-2; Sampling/drilling from ice; Cape Roberts Project CRP; Cape Roberts; Hannah; Victoria Land; Antarc*; Antarctica; antartic*
• Online Access: https://dx.doi.org/10.1594/pangaea.545144; https://doi.pangaea.de/10.1594/PANGAEA.545144

A diverse assemblage of marine palynomorphs was recovered from the Oligocene - Miocene section of CRP-2/2A. Most of the assemblage is composed of previously unrecognised species. Three distinct groups of marine palynomorph were recognised: (1) prasinophytes, mainly Cymatiosphaera, (2) acritarchs, mainly Leiosphaeridia and Sigmopollis although Leiofusa is an important component of the bottom half of the hole, and (3) dinoflagellate cysts. About 27 species of in situ dinoflagellate cysts were recorded, of which seven apparently undescribed species of Lejeunecysta form a prominent component. Reworked specimens of several species of the Paleogene Transantarctic Flora occur in CRP-2/2A sediments. Several abundance peaks of reworked taxa from the Transantarctic Flora are recorded. Three marine palynomorph zones were recognised (MP3, MP2, MP1), considered to be early Oligocene, late Oligocene, and late Oligocene/early Miocene in age respectively. Samples from the Quaternary and Pliocene part of CRP-2/2A were also examined. These proved either barren or yielded very sparse low diversity floras. : r = rare, f = few, c = common, a = abundant