Articles | Volume 15, issue 1
01 Nov 1964
 | 01 Nov 1964

Über glaziäre Stauchungen in den Mellendorfer und Brelinger Bergen nördlich von Hannover .

Hans Dietrich Lang

Abstract. The Mellendorf and Brelingen hills are part of the large chain of contorted endmoraines (Drenthe stadial) which can be followed from the Netherlands to the region north of Braunschweig. The clay occurrences near Mellendorf, parts of them well-known for a long time, are blocks or overthrusts transported there by glacial movements. The dip of the tilted beds and the strike of clay occurrences indicate glacial thrusts from ENE, from W, TOW and from N. The dip of tilted sands and gravels in the Brelingen hills, however, points to a direction of ice motion from N to S.

Micropalaeontological investigations in the clays of the Mellendorf and Brelingen hills have revealed the existence of foraminifera of Lower Cretaceous age, beginning with the Hauterivian, and a few of them also of the Upper Cretaceous. The proved thrust directions point to regions where the respective old beds of the Lower Cretaceous are exposed. Accordingly the length of transport must have been about 7—8 km. The slightly undulating country around Mellendorf is covered by a sheet of till. After the contortion, the ice advanced over the Mellendorf hills in a southern direction. The Brelingen hills, showing very recent relief and without a covering till, are younger and belong to a later recessional phase; the ice did not override them. The investigations demonstrate that three, perhaps even four, glacial thrusts of the Drenthe stadial took part in the genesis of this region.