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Working Group Upper Cretaceous Foraminifera Catalog of Maastrichtian Foraminifera
Mission and path


we want to build a comprehensive catalog of Upper Cretaceous foraminifera. It shall be freely accessible thru the webpage.


We sample and process Upper Cretaceous rocks as a hobby out of fun. We extract the forams, photograph and identify them based on a comprehensive set of literature.

We integrate images provided by professionals. The share of images by professionals shall be about two-thirds.
Who we are

  • Hesemann, Michael: concept, sampling, processing, photographing and identification, web and database, contact to professional contributors
  • Ketelsen, Dieter: preparing fieldtrips, sampling, processing, photographing and identification
  • Raveling, Stefan: providing core-samples and from construction sites, processing, photographing and identification

  • Contributors
  • Baubkus, Werner: sampling and photographing
  • Elicki, Olaf: 279 images
  • Frenzel, Peter: 600+ images and samples
  • Friedman, Virginia: Cenomanian specimens of the Eagle Ford Formation,Texas.
  • Georgescu, Marius Dan: contribution of 300+ images
  • Jaff, R.B.N.: contribution of images from his PhD thesis
  • Museum Helgoland (Peter Schumacher): providing samples

  • We thank the Smithonian Institution National Museum of Natural History and the IODP, ODP and DSPD for sharing their work.

    integration of 2.775 datasets (=imaged specimens), of which
    2.308 are contributed and identified by professional scientists.
    Each consists of an image and accompanying 24 data.

    accessibilty of images and data through the
    well structured database and query

    includes 335 genera and 848 species

    key to species for benthics

    talks on Upper Cretaceous foraminifera were given in Berlin, Hamburg, Hannover and near Schwerin

    A publication was made: Hesemann, M., Dieter Ketelsen, 2017: Index Foraminifera in chalk marl smaers at the Brodtener Ufer (Coast of the Western Baltic Sea), Geschiebekunde aktuell 33 (4): 111-117
    Actual work and plans for 2023

  • not much
  • possibly processing samples from our field-trip to Denmark (image)
  • K-PG boundary