Leaving no stone unturned: the feedback between increased biotic diversity and early diagenesis during the Ordovician

Wright, V. Paul and Cherns, Lesley ORCID: https://orcid.org/0000-0002-9052-3213 2016. Leaving no stone unturned: the feedback between increased biotic diversity and early diagenesis during the Ordovician. Journal of the Geological Society 173 (2) , pp. 241-244. 10.1144/jgs2015-043

Preview

PDF - Accepted Post-Print Version Download (855kB) | Preview

Abstract

Ordovician change in the nature of seafloor carbonates saw rapid decline of previously widespread flat pebble conglomerates and the Palaeozoic peak abundance of hardgrounds. The effective disappearance of flat pebble conglomerates, widely attributed to physical disruption of substrate by bioturbation, is reinterpreted as reflecting increased depth of carbonate precipitation below the Taphonomically Active Zone such that early lithified carbonates were less frequently reworked by scour. With deeper, more stable zones of cementation, exhumed limestones formed hardgrounds, whose mid-Ordovician acme supported rapid increase in epizoan diversity. Further deepening of cementation to below normal scour accompanied post-Ordovician decline in submarine hardgrounds.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Publisher:	Geological Society
ISSN:	0016-7649
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	26 October 2015
Last Modified:	30 Nov 2024 11:00
URI:	https://orca.cardiff.ac.uk/id/eprint/88244

Citation Data

Cited 8 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item