Geologie en Mijnbouw

, Volume 78, Issue 1, pp 73–85

Subaerial terminoglacial fans II: a semi-quantitative sedimentological analysis of the middle and distal environments

  • T. Zieliński
  • A.J. van Loon
Article

Abstract

Twenty-five fans in NE Poland, formed under subaerial terminoglacial (previously called ‘ice-contact’) conditions, were investigated to model the dominant genetic processes involved. These fans show, as do other types, a proximal, a middle and a distal subenvironment. It is found, however, that the characteristics of these subenvironments as present in subaerial terminoglacial fans differ in several respects from those in fans formed under other climatic conditions. The present study deals with the middle and distal subenvironments. These appear to be much less complex than the proximal subenvironment in this type of fan. The middle terminoglacial fan comprises two sandy facies, characterized by unchannelized transport (mainly sheet floods) and stream flows. The distal terminoglacial fan is characterized by one (sandy/silty) facies, resulting from unchannelized currents and from settling in ephemeral ponds; braided streams play a secondary part in this fan subenvironment. The characteristics of the middle and distal fan subenvironments are described and illustrated, as is the facies from the distal subenvironment. Their vertical and lateral relationships are presented in a facies model.

facies analysis fluvioglacial sedimentation glacial fan ice-contact deposits Poland semi-quantitative analysis terminoglacial zone Weichselian 

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • T. Zieliński
    • 1
  • A.J. van Loon
    • 2
  1. 1.Department of Earth SciencesSilesian UniversitySosnowiecPoland, e-mail
  2. 2.GeocomAH OosterbeekThe Netherlands, e-mail

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