Impact Structures
Currently ca. 170 impact craters are known on Earth; about one third of those structures are not exposed on the surface and can only be studied by geophysics or drilling. The impact origin of geological structures can only be confirmed by petrographic and geochemical studies; thus, it is of crucial importance to obtain samples of subsurface structures. In addition, also structures that have surface exposures often require drilling and drill cores, to obtain information of the subsurface structure, to provide ground-truth for geophysical studies, and to obtain samples of rock types not exposed at the surface. For many years drilling of impact craters was rarely done for reasons unrelated to their impact origin.
(by Christian Koeberl & Bernd Milkereit, 2005)
| News Highlights | ||||||||||||||||||||||||||||
ECORD/ICDP MagellanPlus Call for Proposals Lake Ohrid Drilling Recovered Continuous Record Lake El’gygytgyn Second Overview Paper Scientific Drilling Issue 15 Online 2013 International Van Earthquake Symposium NSF Workshop: Drilling Active Tectonics and Magmatism New SAG Composition for 2013 The Fennoscandian Arctic Russia - Drilling Early Earth Project Scientific Drilling Issue 14 Online Imaging the Past to Imagine our Future | ||||||||||||||||||||||||||||
| Daily News from Sites | ||||||||||||||||||||||||||||
Lake Ohrid:
The Cerava site was finished in the early morning hours. Lifting the anchors, towing the barge to the... | ||||||||||||||||||||||||||||
| Calendar | ||||||||||||||||||||||||||||
NSF Workshop on Scientific Drilling and the Evolution of the Earth System NSF Workshop: Drilling Active Tectonics and Magmatism NSF Workshop: Drilling into High-Enthalpy Geothermal Systems | ||||||||||||||||||||||||||||
| Contacts | ||||||||||||||||||||||||||||
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