Triassic-Jurassic Biotic Turnover

Hans-Dieter Sues, Co-Leader, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 2C6, Canada
Alfred M. Ziegler, Co-Leader, Department of the Geophysical Sciences, University of Chicago, Henry Hinds Laboratory, 5734 S. Ellis Ave., Chicago, IL 60637
Sarah J. Fowell, Department of Geology and Geophysics, Box 755780, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA
Jenny McElwain, Dept. of Animal & Plant Sciences, University of Sheffield, Sheffield, S10 2TN, United Kingdom
Emma Rainforth, Lamont-Doherty Earth Observatory, Palisades, New York, 10964, USA
Mihai Popa, University of Bucharest, Faculty of Geology and Geophysics, Laboratory of Paleontology, 1, N. Balcescu Ave., 70111, Bucharest, Romania
Nick Salkowski, Lamont-Doherty Earth Observatory, Palisades, New York, 10964, USA



1. Abrupt biotic change on land?

2. Is there large-scale change among terrestrial vertebrates?

3. Does the change coincide with floral changes (which are considerable at the species level in NW Europe)?

4. Is there synchronicity between the biotic changes in the continental and marine realms?

5. Is there a relationship between the biotic changes and:

a. volcanism (e.g. CAMP)?
b. impacts (s)?
c. both?
d. climate changes?
e. all of the above?


Section Criteria

1. Continuous sedimentation

a. no hiatus / unconformity
b. no facies change (large scale)

2. Independent means of correlation

3. Should have extensive outcrop data correlated to core data

a. pollon/spores
b. plant macrofossils
c. vertebrate bones/tracks

4. Chemostratigraphy

5. Lacustrine settings

6. Significant temporal coverage (Late Triassic - Early Jurassic

7. Igneous effects


Potential Targets

1. Jameson Land, East Greenland

2. Fundy basin, Nova Scotia, Canada

3. Stormberg series (Karoo), southern Africa

4. Northwest Argentina

5. Colorado Plateau, southwestern USA

6. NW Scania, Sweden


Table of Potential Targets

Target Sedimentary Continuity Correlation Means Fossils Chemostratigraphy Temporal Extent Lakes
Jameson Land yes yes yes yes yes
Fundy yes yes yes yes yes
Stormberg ? ? - yes yes
Argentina yes yes - - ?
Colorado Plateau - yes - yes some
Scania yes - yes yes yes
Key for Fossils: = pollen; = macro-plants; = vertebrate bones; = tetrapod tracks