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  • 2020-2024  (16)
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  • 1
    Publication Date: 2023-01-30
    Keywords: Benthic foraminifera; coralline algae; isotope data; Mawmluh_Cement_Quarry; Paleocene-Eocene Thermal Maximum; Sample ID; SECTION, height; thin-section; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 324 data points
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2023-01-30
    Description: The Paleocene Eocene Thermal Maximum (PETM) is associated with major extinction events in the deep ocean, and significant paleogeographic and ecological changes in surface ocean and terrestrial environments. However, the impact of the associated environmental change on shelf biota is less well understood. Here we present a new PETM record of a low paleolatitude late Paleocene-earliest Eocene shallow-marine carbonate platform from Meghalaya, NE India (eastern Tethys). The biotic assemblage was distinctly different to other Tethyan PETM records dominated by larger benthic foraminifera and calcareous algae both in the Paleocene and Eocene. The record is lacking the ecological change from corals to larger foraminiferal assemblages and the Lockhartia dominance, characteristic of other sections in the Tethys. Limestone samples were collected at very high resolution of up to 10 cm from the carbonate successions outcropping in the Mawmluh Cement quarry (25°15.707' N; 91°42.626' E), East Khasi Hills, Meghalaya, NE India. Petrographic thin-sections were prepared from the limestone samples for the light and scanning electron microscopic analysis of the biotic components. In addition to LBF biostratigraphy, carbon isotope analysis was carried out for correlating the shallow benthic zones with the carbon isotope excursion (CIE) for developing a polished record of the PETM. An CIE of ~-3‰ (from 1.96 to -1.08 ‰) tied into the biostratigraphy places the PETM towards the upper part of the Lakadong Limestone from 25.0 to 30.5 m. A change in taxa and forms indicating deeper waters with a concurrent decrease in abundance of shallow water algae suggested a sea-level rise during the onset of the PETM. Oxygen isotope analysis indicated signs of diagenetic overprint in the studied succession.
    Keywords: Benthic foraminifera; coralline algae; isotope data; Paleocene-Eocene Thermal Maximum; thin-section
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2023-08-11
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Acyclic glycerol dialkyl glycerol tetraether (peak intensity); Age, comment; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether; Branched glycerol dialkyl glycerol tetraether, Ia, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ia (peak area); Branched glycerol dialkyl glycerol tetraether, Ib, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ib (peak area); Branched glycerol dialkyl glycerol tetraether, Ic, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ic (peak area); Branched glycerol dialkyl glycerol tetraether, IIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa' (peak area); Branched glycerol dialkyl glycerol tetraether, IIa (peak area); Branched glycerol dialkyl glycerol tetraether, IIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb' (peak area); Branched glycerol dialkyl glycerol tetraether, IIb (peak area); Branched glycerol dialkyl glycerol tetraether, IIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc' (peak area); Branched glycerol dialkyl glycerol tetraether, IIc (peak area); Branched glycerol dialkyl glycerol tetraether, IIIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIa (peak area); Branched glycerol dialkyl glycerol tetraether, IIIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIb (peak area); Branched glycerol dialkyl glycerol tetraether, IIIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIc (peak area); Branched glycerol monoalkyl glycerol tetraethers, Ia (peak area); Branched glycerol monoalkyl glycerol tetraethers, IIa (peak area); Branched glycerol monoalkyl glycerol tetraethers, IIIa (peak area); Cobham; Comment; Crenarchaeol, fractional abundance; Crenarchaeol (peak area); Degree of cyclisation; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Dicyclic glycerol dialkyl glycerol tetraether (peak area); Glycerol dialkyl glycerol tetraether 5 (peak area); Glycerol monoalkyl glycerol tetraether lipids; Glycerol monoalkyl glycerol tetraether lipids (peak area); H-Glycerol dialkyl glycerol tetraether (peak area); Isoprenoid glycerol dialkyl glycerol tetraether, 5; lignite; Lithology/composition/facies; Methylation index of branched tetraethers; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; Monocyclic glycerol dialkyl glycerol tetraether (peak area); pH; Proxy; QU; Quarry; Sample code/label; Tetracyclic glycerol dialkyl glycerol tetraether, fractional abundance; Tetracyclic glycerol dialkyl glycerol tetraether (peak area); Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance; Tricyclic glycerol dialkyl glycerol tetraether (peak area)
    Type: Dataset
    Format: text/tab-separated-values, 2155 data points
    Location Call Number Limitation Availability
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  • 4
    Publication Date: 2023-08-11
    Keywords: lignite
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 16.9 kBytes
    Location Call Number Limitation Availability
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  • 5
    Publication Date: 2023-07-10
    Keywords: Algae, geniculate; Algae, melobesioid, indeterminata; Algae fragments; Benthic foraminifera; coralline algae; Dasyclads; Distichoplax spp.; Halimeda spp.; isotope data; Lithophyllum spp.; Lithoporella spp.; Lithothamnion spp.; Mawmluh_Cement_Quarry; Mesophyllum spp.; Neogoniolithon spp.; Ovulites spp.; Paleocene-Eocene Thermal Maximum; Polystrata alba; Sample ID; SECTION, height; Spongites spp.; Sporolithon spp.; thin-section
    Type: Dataset
    Format: text/tab-separated-values, 2592 data points
    Location Call Number Limitation Availability
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  • 6
    Publication Date: 2023-10-16
    Keywords: 29-277; AGE; Antarctic Ocean/PLATEAU; Australia; Biomarkers; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Eocene-Oligocene Transition; Glomar Challenger; Leg29; paleotemperature; Reference/source; Sea surface temperature; SST, from BAYSPAR (50th Percentile); SST, from BAYSPAR (5th Percentile); SST, from BAYSPAR (95th Percentile); terrestrial temperatures; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
    Location Call Number Limitation Availability
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  • 7
    Publication Date: 2023-10-16
    Keywords: 71-511; AGE; Australia; Biomarkers; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Eocene-Oligocene Transition; Glomar Challenger; Leg71; paleotemperature; Reference/source; Sea surface temperature; South Atlantic/PLATEAU; SST, from BAYSPAR (50th Percentile); SST, from BAYSPAR (5th Percentile); SST, from BAYSPAR (95th Percentile); terrestrial temperatures; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 260 data points
    Location Call Number Limitation Availability
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  • 8
    Publication Date: 2023-10-16
    Keywords: Anglesea_mine; Australia; Biomarkers; Biozone; Branched and isoprenoid tetraether index; Carbon, organic, total; CDRILL; Core drilling; DEPTH, sediment/rock; Eocene-Oligocene Transition; Epoch; Event label; Gippsland Basin, Australia; Methylation index of 5-methyl branched glycerol dialkyl glycerol tetraether; Name; paleotemperature; pH; Ratio; Sample code/label; Sample code/label 2; Temperature, air, annual mean; terrestrial temperatures; Torquay Basin, Australia; Wulla_Wullock-7
    Type: Dataset
    Format: text/tab-separated-values, 608 data points
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2023-10-18
    Keywords: Aberisphaera sp.; Alkenones; Alveolina spp.; Benthic foraminifera; coralline algae; Core tops; Daviesina sp.; Discocyclina spp.; Elazigella altineri; Foraminifera, benthic, indeterminate orthophragminids; Foraminifera, benthic encrusting; Globotextularia sp.; Glomalveolina cf. sireli; Glomalveolina levis; Glomalveolina primaeva; Glomalveolina spp.; Haymanella sp.; Idalina sinjarica; isotope data; Kathina major; Kathina selveri; Kathina spp.; Keramospherids; Lakadongia sp.; Lakadongia tibetica; Lockhartia conditi; Lockhartia haimei; Lockhartia spp.; Mardinella sp.; Mawmluh_Cement_Quarry; Miliolidae; Miscellanea cf. juliettae; Miscellanea cf. yvettae; Miscellanea miscella; Nannofossils description; Nummulitidae; Orbitoclypeus multiplicatus; Orbitoclypeus schopeni; Orbitolites sp.; Orbitosiphon punjabensis; Orbitosiphon sp.; Orduella sp.; Paleocene-Eocene Thermal Maximum; Periloculina sp.; Protogypsina sp.; Quinqueloculina sp.; Ranikothalia cf. sindensis; Ranikothalia nuttalli; Ranikothalia sp.; Rotalia cf. trochidiformis; Rotalia spp.; Sample ID; SECTION, height; Sphaerogypsina sp.; thin-section; Valvulina sp.; Zone; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 7937 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2023-11-30
    Keywords: C29 beta beta-Hopane, δ13C; C31 beta beta-Hopane, δ13C; Carbon, organic, total; Cobham; DEPTH, sediment/rock; lignite; n-Alkane C23, δ13C; n-Alkane C25, δ13C; n-Alkane C27, δ13C; n-Alkane C29, δ13C; QU; Quarry
    Type: Dataset
    Format: text/tab-separated-values, 204 data points
    Location Call Number Limitation Availability
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