Timing of recovery from the end-Permian extinction: Geochr
- journal_title：Geology
- Contributor：Daniel J. Lehrmann ; Jahandar Ramezani ; Samuel A. Bowring ; Mark W. Martin ; Paul Montgomery ; Paul Enos ; Jonathan L. Payne ; Michael J. Orchard ; Wang Hongmei ; Wei Jiayong
- Publisher：Geological Society of America
- Date：2006-
- Format：text/html
- Language：en
- Identifier：10.1130/G22827A.1
- journal_abbrev：Geology
- issn：0091-7613
- volume：34
- issue：12
- firstpage：1053
摘要
Four volcanic-ash beds bracket the Early-Middle Triassic boundary, as defined by conodont biostratigraphy, in a stratigraphic section in south China. High-precision U-Pb dates of single zircons allow us to place the Early to Middle Triassic (Olenekian-Anisian) boundary at 247.2 Ma. Magnetic-reversal stratigraphy allows global correlation. The new dates constrain the Early Triassic interval characterized by delayed biotic recovery and carbon-cycle instability to ∼5 m.y. This time constraint must be considered in any model for the end-Permian extinction and subsequent recovery.