Hermann Häusler

Evidence for steady fault-accommodated strain in the High Himalaya: progressive fault rotation of the southern Tibet detachment system in NW Bhutan

Abstract We present fault analyses from the exhumed middle crustal slab of the High Himalaya in eastern Lunana in NW Bhutan. Fault planes from within two-mica, tourma-line-bearing leucogranites, leucogranitic rocks and migmatites indicate a complex brittle fault pattern with two distinct fault groups. A first group of faults (D1) characterized by chlorite, quartz and tourmaline slickenfibres is mainly defined by steeply SSE-dipping oblique-slip normal faults, and by shallowly NNW-dipping normal faults. A second, younger group of faults (D2) characterized by cataclasis products comprises strike-slip faults displaying conjugate patterns and E- and W-dipping conjugate normal faults, all which indicate E-W extension. Cross-cutting relationships amongst the D1 fault group demonstrate that progressively steeper members of the fault group become younger within the NNW-dipping faults and become older within the SSE-dipping faults. These are all post-dated by the D2 fault group. The D1 fault group indicates that the slab experienced ongoing NNW-SSE extension (i.e. flow) via brittle fault accommodation, contemporaneous with fault rotation. This may reflect rotation of the entire upper orogen due to movement over deeply located major ramp structures formed by out-of-sequence thrusting (Kakhtang Thrust) within the High Himalayan Slab of the Bhutan Himalaya.

Detecting fold structures at the southern flank of the Neogene Vienna Basin in eastern Austria using near-subsurface geophysical methods

AbstractAt the southern flank of the Vienna Basin, spectacular fold structures were exposed in the former Steinbrunn sand pit. The succession of Upper Pannonian age consists of decimeter- to meter-thick sandy, silty, and clayey beds, which are overlain by sandstone beds. Previously, these fold structures have been interpreted differently as of tectonic but also gravitational origin. To gain a more detailed insight into the 3D distribution and orientation of the folds, high-resolution geophysics such as electrical resistivity tomography (ERT), ground-penetrating radar (GPR), and electromagnetics (EM) were applied for mapping the subsurface in the surroundings of the sand pit. The EM results found that the uppermost layer was more clayey northwest and sandier southeast of the sand pit. To directly compare ERT and GPR results with the lithology of the fold structures observed in the sand pit, reference profiles behind the wall of the sand pit were performed. Both methods clearly revealed fold structures para...

Aspects of military hydrogeology and groundwater development by Germany and its allies in World War I

Abstract The German Army developed a military geological organization during World War I largely as a response to near-static battlefield conditions on the Western Front, in Belgium and northern France. In 1916 it was assigned to support military survey, but in late 1918 it was reassigned to the engineer branch of the Army. It contained over 350 geologists and associated technicians by the end of the war. Military geologists contributed advice on engineering geology and hydrogeology (principally on water supply, but also site drainage). They compiled a large number and wide range of groundwater prospect maps to guide military planning, at scales typically from 1:250 000 to 1:25 000. They contributed advice to guide effective use of groundwater by means of dug or bored wells, ‘Abyssinian’ driven tube wells, and protected capturing of springs. Field hygiene was of particular concern, and military geologists helped to avoid contamination of groundwater, for example by appropriate siting of cess-pits and cemeteries. A few officers made use of dowsing in attempts to locate groundwater, including at least one German in support of Ottoman Turk campaigns SW from Palestine towards the British-held Suez Canal, their Austro-Hungarian allies in campaigns south against Italy and in the Balkans, but with relatively insignificant success.

Aspects of German military geology and groundwater development in World War II

Abstract A uniformed geological organization was re-created within the German Army by the start of World War II and developed to comprise 40 centres or teams by 1943. Many specialist geotechnical maps and reports prepared by these military geologists have survived the war as part of the Heringen Collection; some remains in the USA, but other parts are in Germany, notably within the archives of the Bundeswehr Geoinformation Office. German armed forces made use of about 400 geologists in total during the conflict, mostly in the Army. Many of their tasks involved groundwater studies, some including the preparation of groundwater prospect maps. Temporary water supplies were set up during mobile campaigns by planning efficient use or enhancement of existing civilian resources, supplemented by driving shallow ‘Abyssinian’ tube wells, for example, in Operation Sea Lion, the invasion of SE England planned for September 1940 but ultimately cancelled. Sustainable long-term supplies in militarily occupied territory were achieved by rigorous data collection and programmes of well drilling, spring capture or percolation gallery construction, one example being on the Channel Islands between 1940 and 1945. Geophysics sometimes aided the geological and borehole studies that guided deployment of well-drilling teams, for example, in 1941/1942, to support German and Italian forces operational in North Africa.

Did anthropogeology anticipate the idea of the Anthropocene

The term anthropogeology was coined in 1959 by the Austrian geologist Heinrich Häusler. It was taken up by the Swiss geologist Heinrich Jäckli in 1972, and independently introduced again by the German geologist Rudolf Hohl in 1974. Their concept aimed at mitigating humankind’s geotechnical and ecological impact in the dimension of endogenic and exogenic geologic processes. In that context anthropogeology was defined as the scientific discipline of applied geology integrating sectors of geosciences, geography, juridical, political and economic sciences as well as sectors of engineering sciences. In 1979 the German geologist Werner Kasig newly defined anthropogeology as human dependency on geologic conditions, in particular focusing on building stone, aggregates, groundwater and mineral resources. The severe problems of environmental pollution since the 1980s and the political relevance of environmental protection led to the initiation of the discipline ‘environmental geosciences’, which – in contrast to anthropogeology – was and is taught at universities worldwide.