Calcium Carbonate Database: Carbonate.readme file
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               World Data Center A- Paleoclimatology
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NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!!


NAME OF DATA SET: Calcium Carbonate Database
LAST UPDATE: 1/92 (Addition of Farrell sites)  
CONTRIBUTORS: William Ruddiman, University of Virginia, 
and John Farrell, Brown University
IGBP PAGES/WDCA Data Contribution Series #:  91-004 and 92-001

SUGGESTED DATA CITATIONS: 
Ruddiman, W., 1992, Calcium Carbonate Database.  IGBP PAGES/World Data Center-A for
Paleoclimatology Data Contribution Series # 92-001.  NOAA/NGDC Paleoclimatology Program,
Boulder CO, USA.
Farrell, J., 1991, Equatorial Pacific Calcium Carbonate Data.  IGBP PAGES/World Data
Center-A for Paleoclimatology Data Contribution Series # 91-004.  NOAA/NGDC
Paleoclimatology Program, Boulder CO, USA.

References: (for Analysis Techniques)
Mercury Rig, Hulsemann, Journal of Sedimentary Petrology, 1966
Vacuum Precision, Jones and Kaiteris, Journal of Sedimentary Petrology, 1983

GEOGRAPHIC REGION:  Global
PERIOD OF RECORD:  0 - 3,000,000 YBP 
LIST OF FILES:  CO3TOTAL.exe ( contains 313 files, CaCO3 %, total sediment), 
CO3FINE.exe (contains 53 files, CaCO3 %, fine sediment fraction), 
table* (7 files, Farrell age models). Six obsolete display program files removed 3/3/2016.

DESCRIPTION:
This data set contains calcium carbonate percentage data from marine 
sediment cores, plus C14 dates or age models as available, and 
NGDC's display software.  The analyses were done for the CLIMAP 
project, and for numerous regional studies.  On average, the cores span 
100,000  to 200,000 years, sampled at intervals averaging 3,000 to 
10,000 years.  Numerous cores span only the last deglaciation, while a 
few cover intervals up to 3,000,000 years.  The samples analyzed 
consisted of either bulk sediment, or of fine-fraction sediment passed 
through either a 63 or 74 micron sieve.  There is no significant 
difference in analyses based on these two fine fractions, and the sieve 
size is not recorded in the files.  There is also little difference between 
fine and total fraction analyses, but the two types are distinguished by 
file extension.  The data files are compressed for distribution using
PKZIP, and are in self-extracting files.  To unpack the %CaCO3 ASCII
data files for total sediment, type CO3TOTAL.  For the fine fraction
data files, type CO3FINE.  The data files will require about
1.3 megabytes of storage when uncompressed.

The obsolete display software was removed 3/3/2016.

Data File Comments:
Core k708-6 carb ff: turbidite between, approximately, 910-960 cm.
Core k708-1 carb: turbidite between, approximately, 750-758 cm.