The debated age of the ammonoid Durvilleoceras Waterhouse

Waterhouse J.B. (1979) The debated age of the ammonoid Durvilleoceras Waterhouse. Geological Magazine, 116 5: 385-392. doi:10.1017/S0016756800044022


Author Waterhouse J.B.
Title The debated age of the ammonoid Durvilleoceras Waterhouse
Journal name Geological Magazine   Check publisher's open access policy
ISSN 1469-5081
Publication date 1979-01-01
Sub-type Article (original research)
DOI 10.1017/S0016756800044022
Volume 116
Issue 5
Start page 385
End page 392
Total pages 8
Subject 1907 Geology
Abstract Although the ammonoid Durvilleoceras is apparently very close in its morphology to early Triassic genera, it comes from a formation that underlies formations with early Triassic and late Permian faunas, and appears to be of late Middle Permian age. New occurrences of the ammonoid support this thesis. Conjecturally, the genus may have inhabited deep cold waters of the southern hemisphere during the Permian Period, before giving rise to genera found in shelf deposits of the early Triassic. Alternatively, if really Triassic in age, Durvilleoceras indicates a major low-angle thrust, previously unsuspected, that has repeated Triassic sequences for a length of over 450 km before disruption by the Alpine Fault. No evidence is yet known to support this alternative.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 04 Oct 2016, 12:34:17 EST by System User