Murdmaa, Ivar O; Kazarina, G H; Beaufort, Luc; Ivanova, Elena V; Emelyanov, Emelyan M; Kravtsov, Victor A; Alekhina, G N; Vasileva, V E (2010): (Table) Foraminifera abundance and diversity in sediment Core MD02-2508, Baja California continental slope [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.793165, Supplement to: Murdmaa, IO et al. (2010): Upper Quaternary laminated sapropelic sediments from the continental slope of Baja California. Lithology and Mineral Resources, 45(2), 154-171, https://doi.org/10.1134/S0024490210020057
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Published: 2010 (exact date unknown) • DOI registered: 2012-11-22
Abstract:
Core MD02-2508 retrieved from the plateau of the continental slope off Baja California recovered a 40-m-thick section of sapropel (up to 15% Corg), calcareous clay, and diatom ooze with the age of 120 ka at the core bottom. The section is subdivided into three units: Unit I (Holocene) consists of the laminated sapropel; Unit II comprising oxygen isotope stages (MIS) 2, 3, and 4 is represented by homogeneous calcareous clay with interbeds of slightly siliceous sapropelic mud; and Unit III (MIS-5) is composed of laminated sapropelic diatom ooze. Laminated intervals are characterized by the intercalation of two lamina types: (1) dark-colored organic-rich laminae containing multi-species 'oceanic' diatom assemblages, as well as radiolarians, coccoliths, planktonic and benthic foraminifera; (2) lighter-colored laminae consisting of diatom ooze with the neritic colonial diatom assemblages commonly composed of one to three species of a single genera. The dark laminae are assumed to be generated within a high productivity zone over the slope, whereas light ones likely represent diatom mats produced by short-term boisterous phytoplankton blooms, possibly in the coastal upwelling.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Latitude: 23.465200 * Longitude: -111.595700
Date/Time Start: 2002-06-10T13:04:00 * Date/Time End: 2002-06-10T13:04:00
Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 30.39 m
Event(s):
MD02-2508 (MD022508) * Latitude: 23.465200 * Longitude: -111.595700 * Date/Time: 2002-06-10T13:04:00 * Elevation: -606.0 m * Recovery: 40.41 m * Location: Magdanella Margin * Campaign: MD126 (IMAGES VIII - MONA) * Basis: Marion Dufresne (1995) * Method/Device: Giant piston corer (GPC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Foraminifera, benthic | Foram benth | Murdmaa, Ivar O | Abundance estimate | A = abundant, C = common, R = rare, B = absent | |
| 3 | Diversity description | Diversity | Murdmaa, Ivar O | benthic foraminifera; D = high, P = low | ||
| 4 | Dominant species of dead fauna | Dom spec d | Murdmaa, Ivar O | benthic foraminifera | ||
| 5 | Foraminifera, planktic abundance | Foram plankt | Murdmaa, Ivar O | Abundance estimate | A = abundant, C = common, R = rare, B = absent | |
| 6 | Stage | Stage | Murdmaa, Ivar O | marine isotope stage (MIS) based on Blanchet et al. (2007; doi:10.1016/j.quascirev.2007.07.008) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
197 data points