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Cretaceous File in the Federal Institute for-------------------------------------------Geosciences and Natural Resources Hannover=================================!=========
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P. CEPEK, K. KUHNE, R. WOLFART, M. ZIKA

The large volume of fossiliferous core material of the Cretaceous Systembeing accumulated by the Deep Sea Drilling Project and the great amount ofinformation compiled by many different authors in the Initial Reports madeit highly desirable to prepare a summary of the paleontological andbiostratigraphical data in order to improve its accessibility for researchand to allow the computer processing of the data. The data presented in
the Cretaceous data file in Hannover covers all of the Cretaceous cores
gathered in the oceans of the world from the DSDP-IPOD Project. It proved
to be necessary to standardize the paleontological data from numerous
authors. This difficult work has been done for calcareous nannoplankton,dinoflagellates (partly), radiolarians and diatoms. We are working on theforaminifera data. It is planned to enter Cretaceous continental data into
the file, too; it then will be possible to correlate continental and oceanicdata.
The information can be collected on so-called "OPSCAN sheets" (= form sheets
for an OPSCAN reader) or on punch cards. This data is stored in the file
PALBASE, generated and maintained by the data maintenance programs, is thestarting point for a packet of evaluating and editing programs:
HlSEXT prints sample data (specified by punch cards) in word form, as manyas necessary.
HlOUTP is the standard output program for PALBASE: it extracts all data fora site or fossil group in diagram form which makes it easy to recognizechanges of biostratigraphical zones. It is possible to generate large diagrams by connecting several parts. The desired sites can be specified onpunch cards. It is also possible to choose all sites of a fossil group or
those situated within a specified rectangular area. At the end of the print
output HlOUTP generates two line printer plots indicating the positions of
all sites printed. The first plot represents the smallest rectangular areacontaining all printed sites. The second plot is a world map. This plot isthen combined with a transparent foil showing the continental contours.
HlPULL can perform species retrievals from the data stored in PALBASE. It
tests each sample for a specified species combination (logical term).
Example: 16 ~ 32 ~ 101 V 17 ¥ -2
Meaning: all samples containing species 16, 32 and 101 and/or species 17
and not 2 shall be printed.
The output of HlPULL is also in diagram form. As in HlOUTP, geographicalsearching limits can be chosen. HlPULL produces two line printer plots,too. If a site contains a sample corresponding to the logical term, it
will be represented by the character "+", otherwise "-".

INA Newsletter vol.2 - 1980

37

HlBSTD prints out the names, sites, and samples in the file. The lists tobe printed out can be specified; you can also decide whether the corresponding list will be alphabetically or numerically arranged. There are 6
categories of names stored in the file: locality, fossil group, species,observer, stratigraphic stages, and references. Finally, HlBSTD prints
out a list of all sites stored in PALBASE and of the fossil groups thesewere examined for.
HlSED generates a stratigraphic profile for each site. This diagram
contains a computed sedimentation rate for all stratigraphical stages
identified in this site. (Fig. ~.
HlBGED is a program for constructing diagrams of the stratigraphical andlatitudinal distribution (including occurrence frequency) of a singlespecies. (Fig.~).
HlPUB provides the data stored in PALBASE in a form suitable for publication.

Any questions about the content of the Cretaceous databank in HannoverVor requests for data may be addressed to: Dr. Pavel CEPEK, Federal
Institute for Geosciences and Natural Resources, Postfach 510153,
3000 Hannover 51, F.R. Germany.

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39