Diamictite from Nimrod Glacier area, Antarctica: Possible Proterozoic glaciation on the seventh continent

Edmund Stump*, Julia M G Miller, Russell J. Korsch, David G. Edgerton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Late Proterozoic glacial deposits have been found on all continents except Antarctica. Here we describe four units of Late Proterozoic diamictite, with a total thickness of about 10m, from Panorama Point, Nimrod Glacier area, Antarctica, which have characteristics compatible with glaciogenic origin. The diamictite occurs within the Goldie Formation, a sequence of marine turbidites, and is associated with a unit of mafic pillow lavas. The diamictite is commonly structureless and in places laminated. Coarse clasts occur as scattered pebbles and cobbles and as pebbly pods and beds. No striated or faceted clasts were found. A few pebbles may pierce the laminae, but a drop-stone origin is uncertain. Deformation and metamorphism have obscured subtleties of original sedimentary structure. Outsize clasts in laminated sandy siltstone (now schistose) suggest a glaciogenic origin for these diamictites, but deposition by mass-flow processes cannot be ruled out. The discovery in Antarctica of possible Late Proterozoic glaciogenic deposits extends their geographic distribution to all of the major continental masses.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalGeology
Volume16
Issue number3
DOIs
Publication statusPublished - 1988

Fingerprint

Dive into the research topics of 'Diamictite from Nimrod Glacier area, Antarctica: Possible Proterozoic glaciation on the seventh continent'. Together they form a unique fingerprint.

Cite this