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Bird's-eye view of an Ediacaran subglacial landscape

Lookup NU author(s): Professor Bethan DaviesORCiD

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Abstract

© 2019 Geological Society of America.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.


Publication metadata

Author(s): Le Heron DP, Vandyk TM, Kuang H, Liu Y, Chen X, Wang Y, Yang Z, Scharfenberg L, Davies B, Shields G

Publication type: Article

Publication status: Published

Journal: Geology

Year: 2019

Volume: 47

Issue: 8

Pages: 705-709

Online publication date: 22/05/2019

Acceptance date: 03/05/2019

ISSN (print): 0091-7613

ISSN (electronic): 1943-2682

Publisher: Geological Society of America

URL: https://doi.org/10.1130/G46285.1

DOI: 10.1130/G46285.1


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