Bird’s-eye view of an Ediacaran subglacial landscape

Autor(en)
Daniel Le Heron, Thomas Matthew Vandyk, Hongwei Kuang, Yongqing Liu, Xiaoshuai Chen, Yuchong Wang, Zhenrui Yang, Lars Scharfenberg, Bethan Davies, Graham Shields
Abstrakt

Depositional evidence for glaciation (dropstones, diamictites) is common in Neoproterozoic strata, and often debated, but erosional evidence (e.g., unconformities cut directly by ice) is rare. Only two such unconformities are known to have been well preserved globally from the Ediacaran Period (in western Australia and central China). This paper provides the first full description of a spectacular subglacial landscape carved beneath ice masses in the Shimengou area of central China, with classical subglacial bed forms including general faceted forms, müschelbruche, cavetto, spindle forms, and striations that testify to an abundance of meltwater during subglacial erosion. These features were produced during the southward, somewhat sinuous, flow of a temperate to polythermal ice mass.

Organisation(en)
Institut für Geologie
Externe Organisation(en)
University of London, Chinese Academy of Geological Sciences, University College London
Journal
Geology
Band
47
Seiten
705-709
Anzahl der Seiten
5
ISSN
0091-7613
DOI
https://doi.org/10.1130/G46285.1
Publikationsdatum
08-2019
Peer-reviewed
Ja
ÖFOS 2012
105121 Sedimentologie
Schlagwörter
ASJC Scopus Sachgebiete
Geology
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/birdseye-view-of-an-ediacaran-subglacial-landscape(1c9b9ab0-bad8-4f14-bd66-28394dd823fa).html