Articles | Volume 6, issue 3
https://doi.org/10.5194/esurf-6-743-2018
https://doi.org/10.5194/esurf-6-743-2018
Research article
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04 Sep 2018
Research article | Highlight paper |  | 04 Sep 2018

Clast imbrication in coarse-grained mountain streams and stratigraphic archives as indicator of deposition in upper flow regime conditions

Fritz Schlunegger and Philippos Garefalakis

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Short summary
Clast imbrication, which is a depositional fabric where clasts overlap each other similar to a run of toppled dominoes, is one of the most conspicuous sedimentary structures in coarse-grained fluvial deposits. However, the conditions leading to this fabric have been contested. Here, we calculate the hydrological conditions for various stream gradients. We find that clast imbrication most likely forms where channel gradients exceed a threshold and where upper flow regime conditions prevail.