[142] - Zebra stripes in the Atacama Desert revisited – Granular fingering as a mechanism for zebra stripe formation?

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Citation
May, M., Hoffmeister, D., Wolf, D. ., Bubenzer, O., 2019. Zebra stripes in the Atacama Desert revisited – Granular fingering as a mechanism for zebra stripe formation?. Geomorphology, 1 - 57. DOI: 10.1016/j.geomorph.2019.07.014.
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Identification
Title(s):Main Title: Zebra stripes in the Atacama Desert revisited – Granular fingering as a mechanism for zebra stripe formation?
Description(s):Abstract: Although a number of studies have pointed out the remarkable slowness of Earth surface processes in the Atacama Desert, process mechanisms under such extremely limited water availability are poorly understood, and process rates remain unknown. This paper revisits the discussion on the formation of the prominent Atacama-specific hillslope zebra (stone) stripes, previously interpreted to result from palaeo-overland flow (Owen et al., 2013). Compared to previous studies, our data document different stripe characteristics with regard to stripe form and orientation as well as sorting- and bedding-patterns of stripe-confining surface gravel units. We found a remarkable form-concordance between zebra stripes and deposits from experiments on segregation-induced granular fingering. Hence, we propose a combination of seismic shaking and instantaneous dry granular free surface flows as the key mechanism for zebra stripe formation. Our findings underline the potential significance of seismicity in shaping Atacama landscapes, which bear important analogies to extra-terrestrial surfaces.
Identifier(s):DOI: 10.1016/j.geomorph.2019.07.014
Responsible Party
Creator(s):Author: Matthias May
Author: Dirk Hoffmeister
Author: Dennis Wolf
Author: Olaf Bubenzer
Funding Reference(s):Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:Elsevier
Topic
CRC1211 Topic:Surface
Related Sub-project(s):Z2, C3, Z3
Subject(s):CRC1211 Keywords: Geomorphology, Remote Sensing, Arid Zone
Topic Category:GeoScientificInformation
File Details
File Name:1-s2.0-S0169555X19302995-main1.pdf
Data Type:Text
File Size:23597 kB (23.044 MB)
Date(s):Date Accepted: 2019-07-26
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:In Process
Constraints
Download Permission:OnlyCRC1211
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:CRC1211DB Data policy agreement
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:Southern focus area
Measurement Location:--Southern focus area--
Specific Informations - Publication
Status:Accepted
Review:PeerReview
Year:2019
Type:Article
Article Type:Journal
Source:Geomorphology
Page Range:1 - 57
Metadata Details
Metadata Creator:Dirk Hoffmeister
Metadata Created:2019-07-26
Metadata Last Updated:2019-07-26
Subproject:Z2
Funding Phase:1
Metadata Language:English
Metadata Version:V42
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