Publication Date:
2019
Description:
〈span〉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.〈/span〉
Print ISSN:
0091-7613
Electronic ISSN:
1943-2682
Topics:
Geosciences
