Open AccessElongated hills near Schonhorst, Schleswig Holstein: Drumlins or terminal push-moraines?
Author(s) -
Jan A. Piotrowski,
J. Vahldiek
Publication year - 1991
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1990-38-20
Subject(s) - drumlin , geology , moraine , terminal moraine , geomorphology , silt , pebble , glacial period , paleontology , geochemistry , ice stream , sea ice , cryosphere , oceanography
Examination of bore-holes, test pitting and surficial mapping of one hill belonging to the group of smooth, elongated hills by Sch6nhorst, Schleswig-Holstein reveals three geological units: the lower, fine-grained, massive and compact till; the glaciofluvial sand; and the upper, coarse-grained, compact till with minute stringers and lenses of sand and silt. The sequence is strongly glaciotectonically disturbed. A detailed analysis of thin sections of the till micro-fabric, and of radiographs from undisturbed, oriented cores shows a relatively strong NE-SW and NW-SE particle orientation in the lower till and a weakly clustered to random orientation in the upper till. It is suggested that the field represents either drumlins (the more favourable hypothesis) or terminal push-moraines, formed during the first three ice advances of the Weichselian Glaciation.