Early Holocene Gulf of California Time Series DataEntry ID: NOAA_NCDC_PALEO_96-025
Abstract: Location of core:
JPC56 (27°28.16?N; 112°06.26?W).
Recovered in 1990 during R/V Atlantis II Leg 125/8.
Co-chief scientists: Lloyd D. Keigwin (WHOI) and Robert C. Thunell (USC,
Core JPC56 is archived at WHOI, USA.
Age range of time series: JPC56, 502-552 cm below sea floor. Early Holocene,
9500-9200 cal yr BP (AMS radiocarbon ages supplied by L.D. Keigwin)
The data set represents a ... time series of lamina type and thickness from SEM
backscattered electron imagery analysis of resin-embedded polished thin
sections from the sediment section JPC56, 502-552 cm (Pike, 1996; Pike and
Kemp, 1997). Log Number represents the lamina/sub-lamina identification
number, where 1 is stratigraphically the youngest and 847b is the oldest.
These are not always consecutive (i.e. 46, 47, 50) because the number was
originally assigned to the lamina by visual inspection of the BSEI photomosaic.
When the section was logged using the SEM at high magnification, some laminae
were seen to be the same composition as the adjacent lamina (thereby losing a
Log Number), and others could be split further (gaining a Log Number, i.e.
142a, 142b). Lith. is the lamina/sub-lamina lithology: silt - silt and clay;
M - mixed diatom flora; LC - large Coscinodiscus spp.; R - Rhizosolenia spp.;
S - Stephanopyxis palmeriana; C - Chaetoceros spp. resting spores; T - Diatom
mats; OM - other monospecific diatom flora; P - porous lamina, unidentified.
Thick is the thickness of the lamina/sub-lamina. Yr. Thick is the thickness of
the varve. The value includes the laminae thicknesses above it, i.e. laminae
1-4 represent the first varve, laminae 5-7 the second varve etc.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Jennifer Pike and Alan E.S. Kemp
Dataset Title: Early Holocene Gulf of California Time Series Data
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 96-025
Dataset Release Date: 11/96
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 96-025
Other Citation Details: NOAA/NCDC Paleoclimatology ProgramOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/pik...
Paleo Temporal Coverage
Paleo Start Date: 9500 ybp
Paleo Stop Date: 9200 ybp
ISO Topic Category
Data Set Progress
Distribution Media: ftp
Distribution Format: text, excel, csv
Phone: 44 1703 596477
Fax: +44 1703 593059
Email: jp1 at soc.soton.ac.uk
Department of Oceanography University of Southampton Southampton Oceanography Centre European Way
Postal Code: SO14 3ZH
Country: United Kingdom
Pike, J., 1996, High resolution palaeoceanography and palaeoclimatology from late Pleistocene and Holocene laminated sediments, Gulf of California,
Unpublished Ph.D. thesis, University of Southampton, Southampton, UK.
Pike, J. and Kemp, A. E. S. 1997. Early Holocene decadal-scale ocean
variability recorded in Gulf of California laminated sediments.
Paleoceanography 12, 227-238.
Creation and Review Dates
DIF Creation Date: 2006-12-19
Last DIF Revision Date: 2007-03-21