DSDP Paleo data converted to ASCII Spreadsheets

By Pierre A. Zippi, February 1999

Introduction
Obtaining the DSDP paleo data
New file names
New data format
DSDP-to-Spread 1.0 data conversion software
How the converted data sets were constructed
DSDP Paleo data types from CD-ROM data set
Absolute depth reference
Formula for absolute depth calculations
References
What's new!
DSDP paleontology data converted to ASCII spreadsheetsDSDP multi-file format to single spreadsheet

Introduction:
All paleontology data contained on the DSDP CD-ROM was converted to 2093 individual data sets for 21 different fossil types. See DSDP Paleo data types from CD-ROM data set below. The data sets were defined by hole and fossil type (For example: dinoflagellate data from hole 214 is a separate data set from nannofossil data from hole 214).
The original DSDP paleontology data is contained in multiple file locations on DSDP CD-ROM Vol. 1. The scattered data contained in the "PALEO".REF, AGECODE.REF, SITESUM.DAT  and "PALEO".DAT data file is assembled into a spreadsheet of samples (rows) by categories, mainly taxa plus some sample specific information (columns). The data portion of the spreadsheet is preceded by several header lines that provide hole specific information, such as location, DSDP publication, page references, etc.


Obtaining the DSDP paleo data:
This data may be obtained in 2 different ways:
1) Freely download converted data from University of Arizona ftp site
2) Or to convert data directly from the DSDP CD-ROM
    Purchase the DSDP CD-ROM from NGDC/NOAA and the conversion software (Macintosh only) from PAZ Software.
Note: Data files are not directly available from me (PAZ).


New file names:
The converted data files are named for the leg, site number, hole and author; such as,
22214 -HARRIS,W.K.
[Leg: 22, Site: 214, Hole: 1, Author: W.K. Harris]  Note: Blank hole=1

Current file names are Macintosh 31 character names.
NGDC/NOAA may rename the files (mainly remove spaces for UNIX platform).
If files need to be renamed for older DOS or Windows systems, the six character "LegSiteHole" portion of the file name plus a file type extension (.txt) will be unique as long as the file remains in the original fossil type directory.
For example, C:\DINOFLAG\14144A.TXT is unique.


New data format:
The converted data was saved as a tab-delimited ASCII text file with a SimpleText or Excel creator (Mac Finder icon):
All hole and author specific data are recorded as a header in the first lines of the data file as comment lines.
Comment lines start with the "#" symbol. Comment lines may be deleted from the spreadsheet for plotting etc.
Species names are in the first row of the spreadsheet portion as the column headers,
Species codes are in the second row (if selected in options),
Core depth, sample depth, age, core, section and other sample specific references in the first 11 columns of each row.
the resulting species-by-sample matrix filled out with the coded abundance data.
The abundance code legend is contained in the header of each file.


DSDP-to-Spread 1.0data conversion software:
DSDPtoSpread 1.0 was written by Pierre A. Zippi to convert the wealth of under-utilized DSDP paleontology data to a format more readily useful with range charting and stratigraphic analysis software. It is available here.
DSDPtoSpread 1.0 converts DSDP "PALEO".DAT files to tab-delimited ASCII TEXT files.
The resulting files may be used with spreadsheet, statistics and plotting applications on any platform.
The data conversion software will be useful to anyone who already owns the DSDP CD-ROM set available from NGDC.
NOTE: The entire collection of converted DSDP paleontology data has been given to NGDC/NOAA with the understanding that it will be made freely available to the public via ftp transfer.
 Once in spreadsheet format, the utility of the occurrence data is greatly enhanced. Range charts may be constructed or statistical analyses performed. Use a proven commercial spreadsheet or statistics application to manipulate the data.
Use WellPlot 3.0 (available from Pierre Zippi) to plot many different styles of range charts that can be incorporated into virtually any Mac or PC graphics document.  Use Counter 3.0 for new data acquisition directly to large spreadsheets.


How the converted data sets were constructed:
Data was converted from multiple DSDP paleontology data files to spreadsheet format using DSDPtoSpread 1.0.
All sample analyses for each hole are grouped into a single data set.
Many holes have analyses performed by more than one analyst (author).
The author(s) for each sample is listed in the 3rd column.
If you wish to create data sets with only one author (analyst), then use a spreadsheet editor to sort the rows by the author column. Select and copy the samples with the same authorship to a new file.

Initially, I grouped all samples from the same hole and analyzed by the same author as a data set. This worked fine for the earlier holes, but later holes had data "flip-flopping" between authors. This created numerous data sets for the same hole and each data set had large sample gaps. I settled on creating data sets that would be the most useful for biostratigraphy.


DSDP Paleo data types from CD-ROM data set

Fossil types (21)        File name on CD  Taxa   Data files
Algae                     ALGAE.DAT          17   19
Ammonites                 AMMONITE.DAT        3   1
Aptychi                   APTYCHI.DAT        37   3
Archaeomonads             ARCHAEOM.DAT       67   13
Benthic foraminifera      B_FORAMS.DAT     3246   167
Bryozoans                 BRYOZOAN.DAT      190   4
Calcispherulides          CSPHERUL.DAT       26   3
Crinoids                  CRINOIDS.DAT        7   3
Diatoms                   DIATOMS.DAT      1748   221
Dinoflagellates           DINOFLAG.DAT      562   55
Ebridians & Actinicidians EBRI_ACT.DAT       54   39
Fish debris               FISH_DEB.DAT       22   4
Nannofossils              NANNOS.DAT       1746   558
Ostracodes                OSTRACOD.DAT      195   31
Phytolitharia             PHYLITHS.DAT       11   2
Planktonic foraminifera   P_FORAMS.DAT     2062   414
Pollen and spores         POLLEN.DAT        608   32
Radiolaria                RADIOLAR.DAT     2172   340
Rhyncollites              RHYNCOLL.DAT        2   2
Silicoflagellates         SILIFLAG.DAT      692   175
Trace fossils             TRFOSSIL.DAT        3   7

Total taxa of all types in DSDP data:    13470   2093 Total files


Absolute depth reference:
The method for recording the absolute depth reference for DSDP data sets changed with time. For general stratigraphic study purposes, the depth of a sample is apparent (one of the increasing depth-related values in meters). I believe the absolute depth reference calculation is only important for re-locating exact sample positions in cases where re-sampling the archived core is desired. If I am wrong, please contact me at paz@pazsoftware.com.


Formula for absolute depth calculations:
ZSL  = Zero Section Length
SECT = Section Number
INT  = Interval in centimeters within the section
LSL  = Length of last section (cm)
TCD  = Depth to top of core (M)
LS   = Number of last section

If sample occurs in:        Formula used is:
========================    ======================================================
Zero section                AbsDepth = TCD + (INT/100)
Sections 1,2,3, etc.        AbsDepth = TCD + ZSL/100 +(SECT#-1)*1.5 + INT/100
Core Catcher (pre-leg47)    AbsDepth = TCD + ZSL/100 + LS*1.5 + INT/100
Core Catcher (post-leg47)   AbsDepth = TCD + ZSL/100 + (LS-1)*1.5 + LSL + INT/100

NOTE: Occasionally no explicit centimeter interval is assigned to a sample taken from within a core catcher. In these cases, a length of 10 cm is assigned.


References:
Absolute depth: EXPLAN.DOC from DSDP CD ROM data Set, DSDP Explanatory Notes 4/87: Page 5-6.

DSDP CD-ROM Data Set: Marine Geological and Geophysical Data from the Deep Sea Drilling Project. CD-ROM Data Set. Joint Oceanographic Institutions, Inc. US Science Support Program and National Geophysical Data Center.


What's New!
A consolidated database of DSDP/ODP site summary information and which paleontology types are available is nearly complete. This will be made available shortly. Stayed tuned.



Pierre A. Zippi
7518 Twin Oaks Court
Garland, Texas 75044

(972)-496-3642
email: paz@pazsoftware.com

Go to: PAZ Software Homepage