/* DATA DESCRIPTION: Citation: Askin, R A; Raine, J Ian (2000): Cenozoic terrestrial palynomorphs from the late Oligocene to early Miocene section of sediment core CRP-2/2A (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.143860, Supplement to: Askin, RA; Raine, JI (2000): Oligocene and early Miocene terrestrial palynology of the Cape Roberts drillhole CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 493-501, hdl:10013/epic.28257.d001 Abstract: Sparse terrestrial palynomorphs (spores and pollen) were recovered from glacigene Lower Miocene and Oligocene core samples from the Cape Roberts Project (CRP) drillhole CRP-2/2A, Victoria Land Basin, Antarctica. Rarity of palynomorphs probably results from the spares periglacial vegetation in the surrounding landscape at the time of deposition, as well as dilution from rapid sediment accumulation. The Miocene and Late Oligocene vegetation is interpreted as including herb-moss tundra with low-growing woody plants (including Nothofagus and podocarp conifers) in more protected areas, similar to that encountered in the Miocene of CRP-1. Species richness and numbers of specimens increase downhole, a trend that begins very gradually below ~307 mbsf, and increases below ~443 mbsf through the Early Oligocene. These lower assemblages reflect low diversity woody vegetation dominated by several species of Nofhofagus and podocarps, growing in somewhat milder conditions, though still cold temperate to periglacial in the Early Oligocene. The CRP-2/2A core provides new biostratigraphical information, such as the First Appearance Datums (FADS) of Tricolpites sp. a near the Oligocene/Miocene boundary, and Marchantiaceae in the Early/Late Oligocene transition: these are taxa that along with N. lachlaniae, Coptospora spp. and Podocarpidites sp.b characterize assemblages recovered from outcrops of the Pliocene Sirius Group in the Transantarctic Mountains. Some elements of the extremely hardy periglacial tundra vegetation that survived in Antarctica into the Pliocene had their origin in the Oligocene during a time of deteriorating (colder, drier) climatic conditions. The CRP results highlight the long persistence of this tundra vegetation, through approximately 30 million years of dynamically changing climatic conditions. Rare Jurassic and more common Permian-Triassic spores and pollen occur sporadically throughout the core. These are derived from Jurassic Ferrar Group sediments, and from the Permian-Triassic Victoria Group, upper Beacon Supergroup. Higher frequencies of reworked Beacon palynomorphs and coaly organic matter below ~307 mbsf indicate greater erosion of the Beacon Supergroup for this lower part of the core. A color range from black, severely metamorphosed specimens, to light-colored, yellow (indicating low thermal alteration), reworked Permian palynomorphs, indicates local provenance in the dolerite-intruded Beacon strata of the Transantarctic Mountains, as well as areas (now sub-ice) of Beacon strata with little or no associated dolerite well inland (cratonwards) of the present Transantarctic Mountains. Project(s): Cape Roberts Project (CRP) (URI: https://en.wikipedia.org/wiki/Cape_Roberts_Project) Coverage: LATITUDE: -77.005980 * LONGITUDE: 163.719450 DATE/TIME START: 1998-10-16T07:30:00 * DATE/TIME END: 1998-11-25T14:20:00 MINIMUM ELEVATION: -177.9 m * MAXIMUM ELEVATION: -177.9 m Event(s): CRP-2A (14.2 km at 096° true from Cape Roberts) * LATITUDE: -77.005980 * LONGITUDE: 163.719450 * DATE/TIME START: 1998-10-16T07:30:00 * DATE/TIME END: 1998-11-25T14:20:00 * ELEVATION: -177.9 m * Recovery: 624 m * LOCATION: off Cape Roberts, Ross Sea, Antarctica * CAMPAIGN: CRP-2 (URI: hdl:10013/epic.28290.d001) * BASIS: Sampling/drilling from ice * METHOD/DEVICE: Core wireline system (CWS) * COMMENT: 921 m at 284° from CRP-1. Sea-ice thickness: 2.0 m (1 Oct) to 2.2 m (23 Nov). Sea riser embedded to 13.03 mbsf. Lateral ice movement: 9.87 m to east from 17 Oct to 23 Nov. HQ core to 199.31 mbsf. NQ core to 624.15 mbsf. 13.03 to 45.97 mbsf, 11.29 m (34%) partially following CRP-2. 45.07 to 624.15 mbsf, 548.67 m (95%) new hole. Deepest core-lithology: hard sandy siltstone. Deepest core-age: earliest Oligocene (ca. 33 Ma on diatoms, nannofossils and dinoflagellates) Parameter(s): Depth, top/min [m] (Depth top) * PI: Askin, R A Depth, bottom/max [m] (Depth bot) * PI: Askin, R A Assamiapollenites incognitus [#] (Assamiapollenites in) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Cyperaceaepollis sp. [#] (Cyperaceaepollis sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Cibotiidites sp. [#] (Cibotiidites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Coptospora spp. [#] (Coptospora spp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Cyathidites minor [#] (Cyathidites minor) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Dacrycarpites sp. [#] (Dacrycarpites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Liliacidites variegatus [#] (Liliacidites variega) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Marchantiaceae [#] (Marchantiaceae) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Microalatidites paleogenicus [#] (Microalatidites pale) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Microalatidites sp. [#] (Microalatidites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Microcachrydites antarcticus [#] (M. antarcticus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites asperus [#] (N. asperus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites flemingii [#] (N. flemingii) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites cf. flemingii [#] (N. cf. flemingii) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites lachlaniae [#] (N. lachlaniae) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites matauraensis [#] (Nothofagidites matau) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Nothofagidites spp. [#] (Nothofagidites spp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: brassii group Nothofagidites spp. [#] (Nothofagidites spp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: fusca group Osmundacidites wellmanii [#] (Osmundacidites wellm) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Phormium sp. [#] (Phormium sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Phyllocladidites mawsonii [#] (Ph. mawsonii) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Podosporites erugatus [#] (Podosporites erugatu) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: Questionable Podocarpidites cf. exiguus [#] (P. cf. exiguus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Podocarpidites ellipticus [#] (P. ellipticus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Podocarpidites cf. torquatus [#] (P. cf. torquatus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Podocarpidites sp. [#] (Podocarpidites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: a Podocarpidites sp. [#] (Podocarpidites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: b Podocarpidites spp. [#] (Podocarpidites spp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Ranunculaceae [#] (Ranae) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: Questionable Ricciaesporites sp. [#] (Ricciaesporites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Stereisporites antiquasporites [#] (Stereisporites antiq) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Stylidiaceae [#] (Stylidiaceae) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: Questionable Trichotomosulcites subgranulatus [#] (T. subgranulatus) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Tricolpites sp. [#] (Tricolpites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: a Tricolpites sp. [#] (Tricolpites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: b Tricolpites sp. [#] (Tricolpites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology * COMMENT: c Tricolpites sp. [#] (Tricolpites sp.) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Spores, pteridophyte indeterminata [#] (Spores pterid) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Pollen, angiosperm indeterminata [#] (Pollen angiosperm indet) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology Microthyriaceae (Fungi) [#] (Microthyriaceae) * PI: Askin, R A * METHOD/DEVICE: Counting, palynology License: Creative Commons Attribution 3.0 Unported (CC-BY-3.0) (URI: https://creativecommons.org/licenses/by/3.0/) Size: 363 data points */ Depth top [m] Depth bot [m] Assamiapollenites in [#] Cyperaceaepollis sp. [#] Cibotiidites sp. [#] Coptospora spp. [#] Cyathidites minor [#] Dacrycarpites sp. [#] Liliacidites variega [#] Marchantiaceae [#] Microalatidites pale [#] Microalatidites sp. [#] M. antarcticus [#] N. asperus [#] N. flemingii [#] N. cf. flemingii [#] N. lachlaniae [#] Nothofagidites matau [#] Nothofagidites spp. [#] (brassii group) Nothofagidites spp. [#] (fusca group) Osmundacidites wellm [#] Phormium sp. [#] Ph. mawsonii [#] Podosporites erugatu [#] (Questionable) P. cf. exiguus [#] P. ellipticus [#] P. cf. torquatus [#] Podocarpidites sp. [#] (a) Podocarpidites sp. [#] (b) Podocarpidites spp. [#] Ranae [#] (Questionable) Ricciaesporites sp. [#] Stereisporites antiq [#] Stylidiaceae [#] (Questionable) T. subgranulatus [#] Tricolpites sp. [#] (a) Tricolpites sp. [#] (b) Tricolpites sp. [#] (c) Tricolpites sp. [#] Spores pterid [#] Pollen angiosperm indet [#] Microthyriaceae [#] 15.75 15.76 1 21.02 21.03 1 22.33 22.34 1 26.79 26.80 1 27.88 27.89 1 29.00 29.02 1 32.75 32.76 1 1 34.38 34.39 1 36.24 36.27 1 1 40.54 40.55 1 12 2 2 3 12 1 1 44.08 44.09 1 1 2 ?2 47.41 47.54 1 1 4 1 1 2 3 3 1 2 1 1 51.96 51.97 1 1 54.17 54.18 1 55.80 55.81 1 57.32 57.42 1 59.97 59.98 1 63.28 63.29 1 76.12 76.13 1 93.76 93.77 1 103.62 103.63 1 109.13 109.14 1 1 113.50 113.51 1 118.88 118.89 1 1 1 123.50 123.51 1 1 128.09 128.10 1 1 139.91 139.92 1 1 147.53 147.54 1 154.47 154.48 1 165.89 165.90 2 177.75 177.76 1 1 215.24 215.25 1 1 215.49 215.52 1 236.34 236.35 1 245.49 245.50 1 1 1 256.03 256.04 1 2 1 260.00 260.02 1 1 1 3 1 270.94 270.95 1 307.12 307.13 ?1 1 2 316.50 316.52 ?1 2 325.66 325.67 ?1 1 1 1 1 335.29 335.30 2 1 1 339.80 339.82 1 1 346.12 346.13 1 1 2 1 1 353.61 353.62 1 1 1 358.20 358.22 1 2 363.00 363.01 1 1 1 369.85 369.86 1 1 382.25 382.26 1 390.17 390.19 1 1 1 412.25 412.27 1 2 1 2 429.32 429.33 1 437.69 437.70 1 1 1 1 2 444.76 444.78 1 1 2 4 1 1 3 453.26 453.27 3 3 5 9 1 3 1 1 464.98 465.18 1 2 2 1 1 1 474.97 474.98 1 1 1 2 480.81 480.82 4 2 1 486.32 486.34 3 1 502.55 502.56 1 507.77 507.79 1 1 515.82 515.83 1 1 524.46 524.48 2 1 4 1 536.50 536.51 1 2 1 7 1 1 1 1 543.81 543.83 1 548.46 548.47 1 3 4 1 1 556.06 556.07 6 4 564.68 564.70 6 1 1 575.36 575.37 1 1 1 1 3 22 1 25 7 1 1 584.59 584.61 1 3 2 6 1 594.90 594.91 1 604.44 604.46 1 3 612.60 612.61 2 1 620.21 620.22 2 1 1 623.77 623.79 1 1 624.14 624.15 1 2 1 1 1