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Rossignol-Strick, Martine; Paterne, Martine (1999): (Table 1) Comparison of three chronologies for the sapropel series of cores KC01-KC01b [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.790758, Supplement to: Rossignol-Strick, M; Paterne, M (1999): A synthetic pollen record of the eastern Mediterranean sapropels of the last 1 Ma: implications for the time-scale and formation of sapropels. Marine Geology, 153(1-4), 221-237, https://doi.org/10.1016/S0025-3227(98)00080-2

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Published: 1999 (exact date unknown)DOI registered: 2012-11-08

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Abstract:
The Quaternary climate of southern Europe (south Italy and Greece) is investigated by pollen analysis of the sapropels which were deposited in the deep eastern Mediterranean Sea during the last 1 million year (Ma). The time-scale of core KC01b in the Ionian Sea has been established by tuning its oxygen isotopic record to the ice volume model of Imbrie and Imbrie (1980, doi:10.1126/science.207.4434.943). For the last 250,000 year (250 ka), the previous pollen studies and astronomical tuning have been confirmed. Sapropels were deposited under a large range of Mediterranean climates: fully interglacial, fully glacial, and intermediary, as revealed mainly by the balance between the respective pollen abundances of oak (Quercus) and sage-brush (Artemisia). The high value of the oak reveals the warm and wet climate of an Interglacial, and the high value of the sage-brush, the dry and cold climate of a Glacial. Whereas the Mediterranean climate is directly related to the variation of the high-latitude ice sheets, the deposition of sapropels is not so. In contrast with the wide climatic range, sapropels were deposited only when summer insolation in the low latitudes reached its highest peaks. However, between 250 ka and 1 Ma, that stable pattern is not yet established. Only six sapropels are observed, many expected ones do not appear, even as ghosts signalled by peaks of barium abundance, that remain after the post-deposition oxidation of organic matter. The pattern of sapropel formation in stable and direct relationship to highest insolation does not seem to apply. For five of those sapropels, neither climate extremes are observed; they mainly formed during intermediary types of Mediterranean climate. In contrast, one sapropel (and one ghost) relates to a relatively low peak of insolation, and its climate is of a unique, composite type not seen later. This might suggest an unsuspected, more complex pattern linking the formation of Mediterranean sapropels to the astronomical configuration.
Coverage:
Latitude: 36.250000 * Longitude: 17.740000
Date/Time Start: 1991-01-01T00:00:00 * Date/Time End: 1991-01-01T00:00:00
Minimum DEPTH, sediment/rock: 1.195 m * Maximum DEPTH, sediment/rock: 33.005 m
Event(s):
KC01 * Latitude: 36.250000 * Longitude: 17.740000 * Date/Time: 1991-01-01T00:00:00 * Elevation: -3640.0 m * Method/Device: Piston corer (PC)
KC01B * Latitude: 36.250000 * Longitude: 17.740000 * Date/Time: 1991-01-01T00:00:00 * Elevation: -3643.0 m * Recovery: 37.04 m * Location: Calabrian Ridge * Campaign: CLIVAMPcruises * Basis: Ship of opportunity * Method/Device: Piston corer (PC) * Comment: No: KC01B
Comment:
Insolation data from Berger, 1978 (doi:10.1016/0033-5894(78)90064-9). Here, the sapropels are assigned the monsoon index ages.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Layer descriptionLayerRossignol-Strick, Martinesapropel
3DEPTH, sediment/rockDepth sedmGeocode
4Depth, top/minDepth topmRossignol-Strick, Martine
5Depth, bottom/maxDepth botmRossignol-Strick, Martine
6Age modelAge modelkaRossignol-Strick, Martinemonsoon index
7Age model, optionalAge model optkaRossignol-Strick, Martinecore tuned to ice volume model, # = 14C age
8Age model, optionalAge model optkaRossignol-Strick, Martineprecission index minimum
Size:
78 data points

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