Time Calibration of Triassic-Jurassic Microfloral Turnover, Eastern North-America

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Journal Article
Year of Publication: 
1993
Authors: 
Fowell, S. J.; Olsen, P. E.
Editor: 
Journal Title: 
Tectonophysics
Journal Date: 
Jul 15
Place Published: 
Tertiary Title: 
Volume: 
222
Issue: 
3-4
Pages: 
361-369
Section / Start page: 
Publisher: 
ISBN Number: 
0040-1951
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1993LN36200006
LDEO Publication Number: 
Call Number: 
Key Words: 
cretaceous-tertiary boundary; mass extinctions; western interior; event; record; ages;
Abstract: 

Palynological data from the Newark basin of the Newark Supergroup reveal a spike in the spore/pollen ratio at the Triassic/Jurassic boundary. This spore spike is coincident with a 60% regional extinction of the palynoflora and approximately synchronous with terrestrial vertebrate extinctions. Orbitally controlled sedimentary cycles allow stratigraphic sections to be calibrated in time, constraining the duration of the microfloral turnover to an interval of 21 ky. The geologically brief palynofloral break is similar to Cretaceous/Tertiary boundary fern spikes. These data support a Triassic/Jurassic boundary impact-extinction scenario.

Notes: 

Ln362Times Cited:35Cited References Count:36

URL: 
<Go to ISI>://A1993LN36200006
DOI: