Overview map of the Lake Constance amphitheatre with boreholes 5068_1 and 5068_2 (A; from Ellwanger et al., 2011, altered) and the vicinity of the 5068_6 drill site (B; map data courtesy of the LGRB)
Location: 47.8882° N, 9.7113° E Reached drill depth: 144 m Bedrock depth: 133 m Drilling completed in 2016 Previous investigations: - in-liner drilling and borehole geophysical survey - whole-core scans for magnetic susceptibility and natural remanent magnetisation - preliminary profile description based on core catcher pieces
Location of the drill site
The village of Gaisbeuren lies at the southern end of the Tannwald Basin, an overdeepening that has presumably been eroded during the third-to-last Hosskirch Glaciation (Ellwanger et al., 2011; Ellwanger, 2015, see 5068_1 TANN).
There, another isolated basin (Gaisbeuren Basin) underlying the Tannwald Basin is presumed based on results from a previous but not anymore existing drill core, which is not unlikely to represent an early Middle Pleistocene glaciation (Ellwanger, 2015).
Due to the supposed exceptional stratigraphic position of the Gaisbeuren Basin, drilling was undertaken by the State Office for Geology, Resources and Mining of Baden-Württemberg (LGRB) in 2016.
Ellwanger, D., 2015,Lithostratigraphische Entwicklung des baden-württembergischen Rheingletschergebiets: Übertiefte Becken- und Moränen-Landschaft: LGRB Fachbericht 2015/4.
Ellwanger, D., Wielandt-Schuster, U.,Franz, M., and Simon, T., 2011, The Quaternary of the southwest German Alpine Foreland (Bodensee-Oberschwaben, Baden-Württemberg, southwest Germany): E&G Quaternary Science Journal, v. 60, p. 306–328.