Original paper

Stratigraphie und Tektonik der Tertiärscholle von Rot-Malsch im Rheingraben

Barth, Sibylle

Abstract

In the region of Rot and Malsch at the Eastern border of the middle part of the Rhinegraben a small block forms a border step to the West of the main fault. I have mapped the subsurface of this block with drill logs of all wells drilled on the oil field Rot as well as with some deeper clay-pits and other exposures. The Mesozoic block of Rot-Malsch is really a field of many smaller blocks with special faults. Consisting of Lias and Dogger on the top, it is faulted down to about 700 m against Muschelkalk and Keuper of the near border. The Tertiary system of the block of Rot-Malsch consists of Eocene and Oligocene sediments: Greybeds (thickness up to 90 m), Pechelbronnbeds (thickness up to 230 m), Lymnaeamarls (thickness up to 120 m), Eocenebasalshales (thickness up to 20 m). The sudden change of thickness of the Pechelbronn beds indicates a maximum of the faulting processes of the border tectonics during the Sannoisian period. The Tertiary sediments are covered by Pleistocene and Holocene with a thickness of up to 15 m.

Keywords

stratigraphytectonicsrotmalschrhine riftgermanymuschelkalkkeupertertiaryeoceneoligocene