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Wall Structures of Palaeotextulariid Foraminifers and Discussion of Microgranular Test Walls

  • Werner E. Piller
Chapter
Part of the NATO ASI Series book series (ASIC, volume 327)

Abstract

Investigations of the test wall structures of Upper Palaeozoic Palaeobigenerina geyeri and other palaeotextulariid foraminifers revealed that the outer layer of the wall, previously interpreted as being microgranular, is agglutinated. The inner layer is composed of equidimensional, rhombohedral crystals apparently arranged in elements perpendicular to the wall surface, which resembles hyaline radial test walls in structure. The walls are perforate and the pores are branched. A comparison of microgranular and agglutinated test walls shows that their distinction seems very artificial and that a reinvestigation is required.

Keywords

Outer Layer Test Wall Wall Structure Wall Layer Calcitic Cement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1990

Authors and Affiliations

  • Werner E. Piller
    • 1
  1. 1.Institut für PaläontologieUniversität WienWienAustria

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