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A giant catastrophic mud-and-debris flow in the Miocene Makran

Burg, Jean-Pierre and Bernoulli, Daniel and Smit, Jeroen and Dolati, Ashgar and Bahroudi, Abbas. (2008) A giant catastrophic mud-and-debris flow in the Miocene Makran. Terra nova, Vol. 20, no. 3. pp. 188-193.

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Official URL: http://edoc.unibas.ch/dok/A5250510

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Abstract

We challenge the former interpretation of the !sedimentary me´ lange" of the Makran accretionary complex as a tectonic me´ lange diapirically emplaced from below and provide evidence for its sedimentary gravitational emplacement from the north during TortonianMessinian times (between 11.8 and 5.8 Ma). It is an olistostrome that includes blocks of ophiolites and oceanic sediments derived from the !coloured me´ lange" to the north, and reworked chunks of the turbidites on which it rests with an erosional truncation. The chaotic scattering of blocks of any size and lithology and the weak, soft-sediment deformation of the matrix argue against a tectonic emplacement of the chaotic formation. Its size and internal structure, together with the size of the individual blocks, make the olistostrome a fossil equivalent of the large, gravitationally emplaced debris flows observed along present-day continental margins and unstable volcanic edifices.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geologie-Paläontologie > Tektonik (nn)
UniBasel Contributors:Bernoulli, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Blackwell Science
ISSN:0954-4879
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:28
Deposited On:22 Mar 2012 14:02

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