Global correlation of the radiolarian faunal change across the Triassic–Jurassic boundary

Precise comparison of the change in radiolarian faunas 3.5 m above a U-Pb zircon dated 199.6 ± 0.3 Ma tuff and approximately coincident with a negative δ 13 C anomaly in the Queen Charlotte Islands, B.C. (Canada) with Inuyama (Japan) sequences indicates that major global changes occurred across the Triassic-Jurassic (T-J) boundary. Nearly 20 genera and over 130 Rhaetian species disappeared at the end of the Triassic. The index genera Betraccium and Risella disappear and the final appearance of Globolaxtorum tozeri, Livarella valida, and Pseudohagiastrum giganteum sp. nov. are also diagnostic for the end of the Triassic. The low-diversity Hettangian survival fauna immediately above the boundary is composed mainly of small, primitive spumellarians with spongy or irregularly latticed meshwork and rod-like spines, and new genera Charlottea, Udalia, and Parahsuum s.l. first appear in the lowest Hettangian in both localities. Irrespective of different sedimentation rates and sedimentary environments, such as shelf to upper slope (Queen Charlotte Islands) and deep sea below carbonate compensation depth (CCD; Inuyama), radiolarians show a similar turnover pattern at the T-J boundary.

[1]  J. Guex,et al.  Phyletic trends in uppermost Triassic (Rhaetian) Radiolaria; two examples from Queen Charlotte Islands, British Columbia, Canada , 1999 .

[2]  A. Hallam.  The end-Triassic mass extinction event , 1988 .

[3]  C. Mcroberts,et al.  End Triassic Bivalve Extinction: Lombardian Alps, Italy , 1995 .

[4]  C. Marshall,et al.  Mass Extinctions and Their Aftermath , 1997 .

[5]  Michael J. Beattie,et al.  Isotopic evidence bearing on Late Triassic extinction events, Queen Charlotte Islands, British Columbia, and implications for the duration and cause of the Triassic/Jurassic mass extinction , 2004 .

[6]  J. Guex.  Simplifications géométriques liées au stress écologique chez certains protistes , 1993 .

[7]  U. K. Tekin.  LATE TRIASSIC (LATE NORIAN-RHAETIAN) RADIOLARIANS FROM THE ANTALYA NAPPES, CENTRAL TAURIDES, SOUTHERN TURKEY , 2002 .

[8]  J. Guex,et al.  Preliminary remarks on the Hettangian ammonite succession in Queen Charlotte Islands, British Columbia , 1994 .

[9]  R. Hori.  Origin of cyclicity in Triassic-Jurassic badded cherts of the Mino accretionary complex from Japan , 1993 .

[10]  Y. Aita,et al.  Preliminary report on Lower Jurassic radiolaria of Gondwana origin from the Kawhia coast, New Zealand , 1996 .

[11]  Y. Aita,et al.  Juxtaposition of Tethyan and non-Tethyan Mesozoic radiolarian faunas in melanges, Waipapa terrane, North Island, New Zealand , 1989 .

[12]  Y. Isozaki,et al.  Triassic and Jurassic Radiolarians from the Inuyama Area, Central Japan , 1980 .

[13]  Y. Isozaki,et al.  Middle and Late Triassic Conodonts from Bedded Chert Sequences in the Mino-Tamba Belt, Southwest Japan Part 2 : Misikella and Parvigondolella , 1983 .

[14]  Y. Isozaki,et al.  Middle and Late Triassic Conodonts from Bedded Chert Sequences in the Mino-Tamba Belt, Southwest Japan Part 1 : Epigondolella , 1982 .

[15]  H. W. Tipper,et al.  Evidence For Defining the Triassic - Jurassic Boundary At Kennecott Point, Queen Charlotte Islands, British Columbia , 1990 .

[16]  H. Kozur.  First Evidence of Liassic in the Vicinity of Csövar (Hungary), and its Paleogeographic and Paleotectonic Significance , 1993 .

[17]  R. Hori.  Radiolarian Biostratigraphy at the Triassic / Jurassic Period Boundary in Bedded Cherts from the Inuyama AreaCentral Japan , 1992 .

[18]  J. Pálfy,et al.  Carbon isotope anomaly and other geochemical changes at the Triassic-Jurassic boundary from a marine section in Hungary , 2001 .

[19]  S. Mizutani,et al.  Radiolaria from the Nadanhada Terrane, Northeast China , 1991 .

[20]  S. Mizutani,et al.  Mesozoic radiolarian biostratigraphy of Japan and collage tectonics along the eastern continental margin of Asia , 1992 .

[21]  E. S. Carter.  Biochronology and Paleontology of uppermost Triassic (Rhaetian)radiolarians, Queen Charlotte Islands, British Columbia, Canada. , 1993 .

[22]  A. Allasinaz.  THE LATE TRIASSIC-HETTANGIAN BIVALVES TURNOVER IN LOMBARDY (SOUTHERN ALPS) , 1992 .

[23]  Paul L. Smith,et al.  Timing the end-Triassic mass extinction: First on land, then in the sea? , 2000 .

[24]  P. Olsen,et al.  The Triassic/Jurassic boundary in continental rocks of eastern North America; A progress report , 1990 .

[25]  R. Hori,et al.  905. LOWER JURASSIC RADIOLARIAN ZONES OF SW JAPAN , 1990 .

[26]  R. Whatley.  Patterns and Rates of Evolution among Mesozoic Ostracoda , 1988 .

[27]  E. T. Tozer.  Latest Triassic ammonoid faunas and biochronology, western Canada , 1979 .

[28]  E. S. Carter.  Evolutionary trends in Latest Norian through Hettangian radiolarians from the Queen Charlotte Islands, British Columbia , 1994 .

[29]  S. Mizutani,et al.  844. TRIASSIC AND JURASSIC RADIOLARIA FROM THE NADANHADA RANGE, NORTHEAST CHINA , 1987 .

[30]  E. S. Carter.  New Biostratigraphic Elements for Dating Upper Norian Strata from the Sandilands Formation, Queen Charlotte Islands, British Columbia, Canada , 1990 .

[31]  Y. Isozaki,et al.  Well‐documented travel history of Mesozoic pelagic chert in Japan: From remote ocean to subduction zone , 1991 .

[32]  Qun Yang,et al.  The Xiphostylidae Haeckel and Parvivaccidae, n. fam., (Radiolaria) from the North American Jurassic , 1989 .

[33]  J. Sepkoski,et al.  Periodicity in extinction and the problem of catastrophism in the history of life , 1989, Journal of the Geological Society.

[34]  R. Hori,et al.  Origin of cyclicity in Triassic‐Jurassic radiolarian bedded cherts of the Mino accretionary complex from Japan , 1993 .

[35]  S. Mizutani,et al.  Isotopic ages of Jurassic siliceous shale and Triassic bedded chert in Unuma, Central Japan. , 1982 .

[36]  Peter Prinz-Grimm,et al.  Radiolarien aus dem Grenzbereich Hettangium/Sinemurium von Nordperu , 2002 .

[37]  R. Hori,et al.  Offscraping accretion of Jurassic chert-clastic complexes in the Mino-Tamba belt, central Japan , 1993 .

[38]  J. Caulet,et al.  Radiolarians in the Sedimentary Record , 2002 .

[39]  J. Guex,et al.  Biochronology and paleontology of lower jurassic (Hettangian and Sinemurian) radiolarians, Queen Charlotte Islands, British Colubia , 1998 .

[40]  E. Irving,et al.  Large (1000 to 4000 km) northward movements of tectonic domains in the northern Cordillera, 83 to 45 Ma , 1996 .

[41]  P. Dumitrică.  Miocene and Quaternary Silicoflagellates in Sediments from the Mediterranean Sea , 1973 .

[42]  C. Mcroberts.  The Triassic-Jurassic ecostratigraphic transition in the Lombardian Alps, Italy , 1994 .

[43]  H. Shibuya,et al.  Paleomagnetism of red cherts: A case study in the Inuyama Area, central Japan , 1986 .

[44]  E. Pessagno.  Upper Jurassic Radiolaria and radiolarian biostratigraphy of the California Coast Ranges , 1977 .

[45]  P. Bown,et al.  The occurrence of calcareous nannofossils in the Triassic/Jurassic boundary interval. , 1990 .

[46]  A. Hallam.  The end-Triassic bivalve extinction event , 1981 .

[47]  P. V. D. Heyden.  A Middle Jurassic to Early Tertiary Andean‐Sierran Arc Model for the Coast Belt of British Columbia , 1992 .

[48]  D. Wilbur,et al.  Sudden Productivity Collapse Associated with the Triassic-Jurassic Boundary Mass Extinction , 2001, Science.

[49]  A. Desrochers,et al.  Stratigraphic Revisions and Carbonate Sedimentology of the Kunga Group [Upper Triassic - Lower Jurassic], Queen Charlotte Islands, British Columbia , 1991 .

[50]  P. Abbott,et al.  Upper Triassic Radiolaria from the San Hipolito Formation, Baja California , 1979 .

[51]  C. Blome.  Upper Triassic Radiolaria and radiolarian zonation from western North America , 1984 .

[52]  K. Kodama,et al.  Low-latitude and Southern Hemisphere origin of Anisian (Triassic) bedded chert in the Inuyama area, Mino terrane, central Japan , 2001 .

[53]  M. Orchard,et al.  Integrated amonoid-cnodont-radiolarian biostratigraphy, Late Triassic Kunga Group, Queen Charlotte Islands, British Columbia , 1989 .

[54]  Hisashi Suzuki,et al.  Paleomagnetism of Triassic and Jurassic red bedded chert of the Inuyama area, central Japan , 2000 .

[55]  Paul L. Smith,et al.  Sinemurian (Lower Jurassic)ammonoid biostratigraphy of the Queen Charlotte Islands, Western Canada , 1994 .

[56]  M. Orchard,et al.  The Triassic-Jurassic (T-J) boundary in Queen Charlotte Islands, British Columbia defined by ammonites, conodonts and radiolarians , 1994 .