Range chart of calcareous nannofossils from ODP Hole 188-1165B (Table 1), supplement to: Villa, Giuliana; Lupi, Claudia; Cobianchi, Miriam; Florindo, Fabio; Pekar, Stephen F (2008): A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 230-244

Tipo Dataset Classe Dati Geologici (terrestri e marini)

Depth, Sediment/rock Sample Code/label Nannofossil Abundance Nannofossils Preservation Species Richness Calcidiscus Leptoporus Ceratolithus Telesmus Coccolithus Pelagicus Coccolithus Pelagicus Ssp. Braarudii Crenalithus Japonicus Crenalithus Doronicoides Emiliania Huxleyi Gephyrocapsa Caribbeanica Gephyrocapsa Oceanica Gephyrocapsa Omega Gephyrocapsa Spp. Gephyrocapsa Aperta Gephyrocapsa Ericsonii Gephyrocapsa Muellerae Helicosphaera Carteri Helicosphaera Burkei Pseudoemiliania Pacifica Pseudoemiliania Lacunosa Ovata Pseudoemiliania Lacunosa Pseudoemiliania Lacunosa Lacunosa Reticulofenestra Asanoi Reticulofenestra Celtica Reticulofenestra Minuta Umbilicosphaera Spp. Umbilicosphaera Hulburtiana Thoracosphaera Spp. Drilling/drill Rig Dsdp/odp/iodp Sample Designation Smear Slide Analysis Leg188 Joides Resolution Ocean Drilling Program (odp)

Bio- and magnetostratigraphic age data and nannofossil assemblage analysis from ODP Site 1165 evidence an anomalous warming event of the surface waters in and around Prydz Bay during the Early Pleistocene, approximately 1 Ma. This results from an increase in the abundance of nannofossils at Site 1165, that occurred at 1 Ma. Detailed high-resolution sampling permits a new bio-magnetostratigraphic interpretation for ODP Site 1165. A decrease in delta18O values at Sites 1165 and 1167 also occurs at this time, supporting the presence of warming conditions in the Prydz Bay area. A return to colder surface waters, indicated by the absence or rare occurrence of nannofossils in the upper cores from Site 1165, suggests that more stable glacial conditions existed in the Prydz Bay basin, for the last 900 ka. The biogenic carbonate sequence identified at Site 1167 is similar to the carbonate shales recovered from the Cape Roberts Project 1. Both have been dated at about 1 Ma, supporting the idea that a significant surface waters warming occurred during the Pleistocene. These data and the presence of calcareous nannofossils from locations around the Antarctic continent also suggest that the warming event was not limited to the analysed basin, but it extended around the East Antarctic continent. These new evidence call for a re-evaluation of the notion that the East Antarctic Ice-Sheet has experienced stable conditions similar to today since the late Neogene.

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Villa G., Lupi C., Cobianchi M., Florindo F., Pekar S. F. (2008). Range chart of calcareous nannofossils from ODP Hole 188-1165B (Table 1), supplement to: Villa, Giuliana; Lupi, Claudia; Cobianchi, Miriam; Florindo, Fabio; Pekar, Stephen F (2008): A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 230-244 [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/pangaea.706554

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Nome campo	Valore
Identificativo del dataset (DOI)	10.1594/pangaea.706554
Altro identificativo	Codice: ingv_783 Gestore del codice: INGV
Temi del dataset	Scienza e tecnologia
Editore del Dataset	PANGAEA - Data Publisher for Earth & Environmental Science
Data di rilascio	01-01-2008
Data di modifica	05-07-2022
Copertura Geografica	Area di competenza dell'unità organizzativa preposta
URI di GeoNames	Non disponibile
Lingue del dataset	italiano
Estensione temporale	Non disponibile
Titolari	University of Parma (UniPR) ROR 02k7wn190
	University of Pavia (UniPV) ROR 00s6t1f81 IPA uni_pv
	Istituto Nazionale di Geofisica e Vulcanologia (INGV) ROR 00qps9a02 IPA ingv
	Queens College ROR 03v8adn41
Frequenza di aggiornamento	mai
Versione di	Non disponibile
Spatial extent	{"type": "MultiPoint","coordinates": [[67.219,-64.3796]]}
Autori	VILLA Giuliana University of Parma (UniPR), Italy
	LUPI Claudia University of Pavia (UniPV), Italy
	COBIANCHI Miriam University of Pavia (UniPV), Italy
	FLORINDO Fabio Istituto Nazionale di Geofisica e Vulcanologia (INGV), Italy
	PEKAR Stephen F. Queens College, United States of America

ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

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