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The Carnian Humid Episode of the late Triassic: a review

  • A. RUFFELL (a1), M. J. SIMMS (a2) and P. B. WIGNALL (a3)

From 1989 to 1994 a series of papers outlined evidence for a brief episode of climate change from arid to humid, and then back to arid, during the Carnian Stage of the late Triassic Epoch. This time of climate change was compared to marine and terrestrial biotic changes, mainly extinction and then radiation of flora and fauna. Subsequently termed, albeit incorrectly, the Carnian Pluvial Event (CPE) by successive authors, interest in this episode of climatic change has increased steadily, with new evidence being published as well as several challenges to the theory. The exact nature of this humid episode, whether reflecting widespread precipitation or more local effects, as well as its ultimate cause, remains equivocal. Bed-by-bed sampling of the Carnian in the Southern Alps (Dolomites) shows the episode began with a negative carbon isotope excursion that lasted for only part of one ammonoid zone (A. austriacum). However, that the Carnian Humid Episode represents a significantly longer period, both environmentally and biotically, is irrefutable. The evidence is strongest in the European, Middle Eastern, Himalayan, North American and Japanese successions, but not always so clear in South America, Antarctica and Australia. The eruption of the Wrangellia Large Igneous Province and global warming (causing increased evaporation in the Tethyan and Panthalassic oceans) are suggested as causes for the humid episode.

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N. Buratti & S. Cirilli 2007. Microfloristic provincialism in the Upper Triassic Circum-Mediterranean area and palaeogeographic implication. Geobios 40, 133–42.

D. M. Cleveland , S. C. Atchley & L. C. Nordt 2007. Continental sequence stratigraphy of the Upper Triassic (Norian–Rhaetian) Chinle Strata, northern New Mexico, U.S.A.: allocyclic and autocyclic origins of paleosol-bearing alluvial successions. Journal of Sedimentary Research 77, 909–24.

J. Dal Corso , P. Mietto , R. J. Newton , R. D. Pancost , N. Preto , G. Roghi & P. B. Wignall 2012. Discovery of a major negative δ13C spike in the Carnian (Late Triassic) linked to the eruption of Wrangellia flood basalts. Geology 40, 7982.

J. H. Dolby & B. E. Balme 1976. Triassic palynology of the Carnarvon Basin, Western Australia. Review of Palaeobotany and Palynology 22, 105–68.

S. G. Driese & C. I. Mora 2002. Paleopedology and stable-isotope geochemistry of late Triassic (Carnian–Norian) paleosols, Durham sub-basin, North Carolina, U.S.A.: implications for paleoclimate and paleoatmospheric pCO2. In Sedimentation in Continental Rifts (eds R. W. Renaut & G. M. Ashley ), pp. 207–18. SEPM Special Publication no. 73.

Y. Druckman , F. Hirsch & T. Weissbrod 1982. The Triassic of the southern margin of the Tethys in the Levant and its correlation across the Jordan Rift Valley. Geologische Rundschau 71, 919–36.

R. F. Dubiel , J. T. Parrish , J. M. Parrish & S. C. Good 1991. The Pangaean megamonsoon evidence from the Upper Triassic Chinle Formation, Colorado Plateau. Palaios 6, 347–70.

S. Furin , N. Preto , M. Rigo , P. Gianolla , J. L. Crowley & S. A. Bowring 2006. High-precision U–Pb zircon age from the Triassic of Italy: implications for the Triassic time scale and the Carnian origin of calcareous nannoplankton and dinosaurs. Geology 34, 1009–12.

J. Haas , T. Budai , O. Gyoori & S. Kele 2014. Multiphase partial and selective dolomitization of Carnian reef limestone (Transdanubian Range, Hungary). Sedimentology 61, 836–59.

T. Hornung , L. Krystyn & R. Brandner 2007. A Tethys-wide mid-Carnian (Upper Triassic) carbonate productivity crisis: evidence for the Alpine Reingraben Event from Spiti (Indian Himalaya)? Journal of Asian Earth Sciences 30, 285302.

L. Ji & F. Meng 2006. Palynology of Yanchang Formation of Middle and Late Triassic in Eastern Gansu Province and its paleoclimatic significance. Journal of China University of Geosciences 17, 209–20.

T. Kolar-Jurkovsek & B. Jurkovsek 2010. New paleontological evidence of the Carnian strata in the Mežica area (Karavanke Mountains, Slovenia): conodont data for the Carnian Pluvial Event. Palaeogeography, Palaeoclimatology, Palaeoecology 290, 81–8.

H. Kozur & G. H. Bachman 2010. The Middle Carnian wet intermezzo of the Stuttgart Formation (Schilfsanstein), Germanic Basin. Palaeogeography, Palaeoclimatology, Palaeoecology 290, 107–19.

S. McLoughlin & A. N. Drinnan 1997. Fluvial sedimentology and revised stratigraphy of the Triassic Flagstone Bench Formation, northern Prince Charles Mountains, East Antarctica. Geological Magazine 134, 781806.

S. McLoughlin , S. Lindstrom & A. N. Drinnan 1997. Gondwanan floristic and sedimentological trends during the Permian–Triassic transition: new evidence from the Amery Group, northern Prince Charles Mountains, East Antarctica. Antarctic Science 9, 281–98.

R. Nakada , K. Ogawa , N. Suzuki , S. Takahashi & Y. Takahashi 2014. Late Triassic compositional changes of aeolian dusts in the pelagic Panthalassa: response to the continental climatic change. Palaeogeography, Palaeoclimatology, Palaeoecology 393, 6175.

S. N. Nielsen 2005. The Triassic Santa Juana Formation at the lower Biobio River, south central Chile. Journal of South American Earth Sciences 19, 547–62.

P. E. Olsen , D. V. Kent , B. Cornet , W. K. Witte & R. W. Schlisse 1996. High-resolution stratigraphy of the Newark Basin (Early Mesozoic, Eastern North America). Geological Society of American Bulletin 108, 4077.

S. Peron , S. Bourquin , F. Fluteau & F. Guillocheau 2005. Paleoenvironment reconstructions and climate simulations of the Early Triassic: impact of the water and sediment supply on the preservation of fluvial systems. Geodinimica Acta 18, 431–46.

R. Porter & R. Gallois 2008. Identifying fluvio-lacustrine intervals in thick playa-lake successions: an integrated sedimentology and ichnology of arenaceous members in the mid–late Triassic Mercia Mudstone Group of south-west England, UK. Palaeogeography, Palaeoclimatology, Palaeoecology 270, 381–98.

C. Pott , M. Krings & H. Kerp 2008. The Carnian (Late Triassic) flora from Lunz in Lower Austria: paleoecological considerations. Palaeoworld 17, 172–82.

G. D. Price 1999. The evidence and implications of polar ice during the Mesozoic. Earth-Science Reviews 48, 183210.

S. J. Prochnow , L. C. Nordt , S. C. Atchley & M. R. Hudec 2006. Multiproxy paleosol evidence for middle and late Triassic climate trends in eastern Utah. Palaeogeography, Palaeoclimatology, Palaeoecology 232, 5372.

M. Rigo , N. Preto , G. Roghi , F. Tateo & P. Mietto 2007, A rise in the carbonate compensation depth of western Tethys in the Carnian (Late Triassic): deep-water evidence for the Carnian Pluvial Event. Palaeogeography, Palaeoclimatology, Palaeoecology 246, 188205.

G. Roghi , P. Gianolla , L. Minarelli , C. Pilati & N. Preto 2010, Palynological correlation of Carnian humid pulses throughout western Tethys. Palaeogeography, Palaeoclimatology, Palaeoecology 290, 89106.

A. Rostasi , B. Raucsik & A. Varga 2011. Palaeoenvironmental controls on the clay mineralogy of Carnian sections from the Transdanubian Range (Hungary). Palaeogeography, Palaeoclimatology, Palaeoecology 300, 101–12.

A. Ruffell & R. G. Shelton 1999. The control of sedimentary facies by climate during phases of crustal extension: examples from the Triassic of onshore and offshore England and Northern Ireland. Journal of the Geological Society, London 156, 779–89.

U. M. Shukla , G. H. Bachmann & I. B. Singh 2010. Facies architecture of the Stuttgart Formation (Schilfsandstein, Upper Triassic), central Germany, and its comparison with modern Ganga system, India. Palaeogeography, Palaeoclimatology, Palaeoecology 297, 110–28.

M. J. Simms & A. H. Ruffell 1990. Climatic and biotic change in the Late Triassic. Journal of the Geological Society, London 147, 321–7.

N. J. Tabor , I. P. Montanez , K. A. Kelso , B. Currie , T. Shipman & C. Colombi 2006. A Late Triassic soil catena: landscape and climate controls on paleosol morphology and chemistry across the Carnian-age Ischigualasto-Villa Union basin, northwestern Argentina. In Paleoenvironmental Record and Applications of Calcretes and Palustrine Carbonates (eds A. M. Alonso-Zarza & L. H. Tanner ), pp. 1741. Geological Society of America, Special Paper no. 416.

Z. Tang , J. Parnell & A. Ruffell 1994. Diagenesis and reservoir potential of Permian-Triassic fluvial/lacustrine sandstones in the southern Junggar Basin, northwestern China. Journal of Paleolimnology 11, 6790.

G. Xu , J. L. Hannah , H. J. Stein , A. Mark , J. O. Vigran , B. Bingen , D. L. Sschutt & B. A. Lundschein 2014. Cause of Upper Triassic climate crisis revealed by Re–Os geochemistry of Boreal black shales. Palaeogeography, Palaeoclimatology, Palaeoecology 395, 222–32.

H. Zerfass , E. L. Lavina , C. L. Schultz , A. J. Vasconelles Garcia , U. F. Faccini & F. Chemale 2003. Sequence stratigraphy of continental Triassic strata of southernmost Brazil: a contribution of southwestern Gondwana palaeogeography and palaeoclimate. Sedimentary Geology 161, 85105.

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