Results 171 to 180 of about 4,338 (216)

Reef development at the Frasnian/Famennian mass extinction boundary

Palaeogeography, Palaeoclimatology, Palaeoecology, 2002
Abstract A newly compiled global reef database indicates that the 5–6 Myr long Frasnian (Late Devonian) metazoan reef episode had relatively low diversity compared to Middle Devonian highs (with over 200 genera of calcitic rugose and tabulate corals).
exaly   +2 more sources

The role of sea-level change and marine anoxia in the Frasnian–Famennian (Late Devonian) mass extinction [PDF]

Palaeogeography, Palaeoclimatology, Palaeoecology, 2008
Johnson et al. (Johnson, J.G., Klapper, G., Sandberg, C.A., 1985. Devonian eustatic fluctuations in Euramerica. Geological Society of America Bulletin 96, 567–587) proposed one of the first explicit links between marine anoxia, transgression and mass ...
Algeo, Algeo, Averbuch, Becker, Becker, Becker, Becker, Belka, Bond, Bond, Bond, Bond, Bratton, Brett, Buggisch, Buggisch, Casier, Casier, Casier, Casier, Chen, Chen, Chen, Chow, Copper, Copper, Copper, Crick, David P.G. Bond, Filer, Geldsetzer, Geldsetzer, Girard, Goddéris, Goodfellow, Hallam, Hallam, Holmes, House, Joachimski, Joachimski, Joachimski, Johnson, Johnson, Kennard, Klapper, Levman, Matyja, Morrow, Muchez, Newell, Orchard, Over, Over, Paproth, Paul B. Wignall, Playford, Playford, Playford, Pujol, Racki, Racki, Racki, Racki, Riquier, Sandberg, Sandberg, Sandberg, Sandberg, Sandberg, Sandberg, Schindler, Southgate, Stephens, Streel, Szulczewski, Szulczewski, Tribovillard, Walliser, Wang, Wignall, Wignall, Ziegler   +82 more
exaly   +3 more sources

Anoxic events in the late Frasnian—Causes of the Frasnian-Famennian faunal crisis?

Geology, 1993
Carbon isotope data collected from five Frasnian-Famennian boundary sections in central Europe show two positive δ 13 C excursions in the late Frasnian (∼367 Ma). Both anomalies coincided with the deposition of the bituminous lower and upper Kellwasser horizons. The carbon isotope patterns indicate two phases of enhanced burial and subsequent recycling
Michael M. Joachimski, Werner Buggisch
openaire   +1 more source

Magnetostratigraphy susceptibility of the Frasnian/Famennian boundary

Palaeogeography, Palaeoclimatology, Palaeoecology, 2002
Magnetosusceptibility event and cyclostratigraphy (MSEC) is used to establish a non-polarity-based magnetostratigraphy susceptibility (MSS) between the stratotype region for the Frasnian/Famennian (F/F) boundary sequence in the Montagne Noire of southern France, the eastern Rheinisches Schiefergebirge of Germany, Belgium, the eastern Anti-Atlas of ...
Rex E Crick, Brooks B Ellwood, Raimund Feist, Ahmed El Hassani, Eberhard Schindler, Roland Dreesen, D.Jeffrey Over, Catherine Girard   +7 more
openaire   +2 more sources

Late Frasnian phillipsastreid biostromes in Belgium

Geological Society, London, Special Publications, 2007
Abstract In the Belgian Namur-Dinant Basin the boundary between the Lustin Formation and the Aisemont Formation (in the Lower rhenana conodont Biozone) corresponds to a fall followed by a rise in sea level, leading to the first recorded late Frasnian coral crisis.
Edouard Poty, Emmanuel Chevalier
openaire   +1 more source

Early Frasnian acanthodians from central Iran

2006
Hairapetian, Vachik, Valiukevičius, Juozas, Burrow, Carole J. (2006): Early Frasnian acanthodians from central Iran.
Hairapetian, Vachik, Valiukevičius, Juozas, Burrow, Carole J.   +2 more
openaire   +1 more source

Tully Formation and pre-Frasnian Genesee Group succession

Bulletins of American Paleontology, 2023
Strata between the middle Givetian Moscow Formation and the newly recognized Givetian-Frasnian zonal stage boundary, at or near the top of the Lodi Member (Penn Yan Formation of the Genesee Group), include limestone-dominated strata of the Tully Formation and coeval siliciclastic deposits of the Gilboa Formation, overlain by progradational ...
Gordon Baird, James Zambito IV, Carlton Brett   +2 more
openaire   +1 more source

The global Frasnian-Famennian »Kellwasser Event«

Geologische Rundschau, 1991
During the UppermostP. gigas conodont zone (P. linguiformis zone) the stepwise Frasnian extinction culminates in the global transgressive-regressive Frasnian-Famennian »Kellwasser event«. Most pelagic organisms of the tropical marine environment are more or less affected by this mass extinction.
openaire   +1 more source

Frasnian-Famennian extinctions

1982
Extinctions are continuous throughout the Phanerozoic. Although a single natural phenomenon brought about by environmental change at any scale, they may be conveniently divided into two classes: background extinction and mass extinction (Raup and Sepkoski, 1982).
openaire   +1 more source

Carbon isotope geochemistry of the Frasnian–Famennian transition

Palaeogeography, Palaeoclimatology, Palaeoecology, 2002
Abstract Carbon isotope records for inorganic and total organic carbon (TOC) as well as for individual organic biomarkers show two positive excursions in the Late Frasnian with comparable shape and amplitude in δ13C. The positive shifts in δ13C can be correlated with the deposition of the Kellwasser horizons.
Joachimski, MM, Pancost, RD, Freeman, KH, Ostertag-Henning, C, Buggisch, W   +4 more
openaire   +2 more sources