Ice-crystal traces imply ephemeral freezing in early Permian equatorial Pangea-Reference-Cited by-同舟云学术

Ice-crystal traces imply ephemeral freezing in early Permian equatorial Pangea

Published:2021-07-20 Issue:11 Volume:49 Page:1397-1401
ISSN:0091-7613
Container-title:Geology
language:en
Short-container-title:

Author:

Pfeifer Lily S.¹,Birkett Brooke A.²,Van Den Driessche Jean³,Pochat Stéphane⁴,Soreghan Gerilyn S.¹

Affiliation:

1. School of Geosciences, University of Oklahoma, 100 East Boyd Street, Norman, Oklahoma 73019, USA

2. Geosciences and Geological and Petroleum Engineering Department, Missouri University of Science and Technology, 1400 North Bishop, Rolla, Missouri 65409, USA

3. Géosciences Rennes–UMR 6118, Université de Rennes, CNRS, F-35000 Rennes, France

4. Laboratoire de Planétologie et de Géodynamique—UMR 6112, Université de Nantes, CNRS, 2 rue de la Houssinière, F-44000 Nantes, France

Abstract

Abstract Delicate impressions in lacustrine strata of the lower Permian (lower Cisuralian) Usclas Formation record ephemeral freezing in equatorial Pangea. These sediments accumulated in the paleoequatorial and intramontane Lodève Basin (southern Massif Central, France) during peak icehouse conditions of the Late Paleozoic Ice Age. Experimental replication of these features supports the interpretation that they are ice-crystal molds. Evidence for films of ice in marginal-lacustrine sediment at such low latitudes and inferred low to moderate altitudes (1–2 km) calls for a reevaluation of climate conditions in eastern equatorial Pangea. Ephemeral freezing implies either cold tropical temperatures (~5 °C cooler than the Last Glacial Maximum) and/or lapse rates that exceeded those of the Last Glacial Maximum. Extreme continentality of the Lodève Basin would have amplified seasonality, albeit the climatic forcing(s) necessary to have promoted cold temperatures in equatorial Pangea remain enigmatic.

Publisher

Geological Society of America

Subject

Geology

Link

http://pubs.geoscienceworld.org/gsa/geology/article-pdf/49/11/1397/5435634/g49011.1.pdf

Reference34 articles.

1. Ice crystal markings;Allan;American Journal of Science,1926

2. Size and perfection of crystals in lake ice;Barns;Journal of Crystal Growth,1985

3. Hercynian high-altitude phenomena in the French Massif Central: Tectonic implications;Becq-Giraudon;Palaeogeography, Palaeoclimatology, Palaeoecology,1996

4. Syn- to post-thickening extension in the Variscan Belt of Western Europe: Modes and structural consequences;Burg;Comptes Rendus de l'Academie des Sciences Paris,1994

5. Strand and undertow markings of Upper Devonian time as Indications of the prevailing climate;Clarke;Thirteenth Report of the Director of the State Museum and Science Department: New York State Museum Bulletin 196,1918

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