(Table) Foraminifera abundance and diversity in sediment Core MD02-2508, Baja California continental slope, supplement to: Murdmaa, Ivar O; Kazarina, G H; Beaufort, Luc; Ivanova, Elena V; Emelyanov, Emelyan M; Kravtsov, Victor A; Alekhina, G N; Vasileva, V E (2010): Upper Quaternary laminated sapropelic sediments from the continental slope of Baja California. Lithology and Mineral Resources, 45(2), 154-171

DOI

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.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.793165
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.793165
Provenance
Creator Ivanova, Elena V;Emelyanov, Emelyan M;Kazarina, G H;Beaufort, Luc;Vasileva, V E;Murdmaa, Ivar O;Alekhina, G N;Kravtsov, Victor A
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2010
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Coverage
Discipline Earth System Research
Spatial Coverage (23N,112W)
Temporal Point 2002-06-10T11:59:59Z