New uppermost Cambrian U-Pb date from Avalonian Wales and age of the Cambrian-Ordovician boundary

被引：36

作者：

Davidek, K ^{[1
]}

Landing, E

Bowring, SA

Westrop, SR

Rushton, AWA

Fortey, RA

Adrain, JM

机构：

[1] State Educ Dept, New York State Geol Survey, Albany, NY 12230 USA

[2] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[3] Brock Univ, Dept Earth Sci, St Catharines, ON K1A 0E8, Canada

[4] Nat Hist Museum, Dept Palaeontol, London SW7 5BD, England

[5] British Geol Survey, Nottingham NG12 5GG, England

来源：

GEOLOGICAL MAGAZINE | 1998年 / 135卷 / 03期

关键词：

D O I：

10.1017/S0016756898008711

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A crystal-rich volcaniclastic sandstone in the lower Peltura scarabaeoides Zone at Ogof-ddu near Criccieth, North Wales, yields a U-Pb zircon age of 491 +/- 1 Ma. This late Late Cambrian date indicates a remarkably young age for the Cambrian-Ordovician boundary whose age must be less than 491 Ma. Hence the revised duration of the post-Placentian (trilobite-bearing) Cambrian indicates that local trilobite zonations allow a biostratigraphic resolution comparable to that provided by Ordovician graptolites and Mesozoic ammonites.

引用

页码：303 / 309

页数：7

共 50 条

[1] Cambrian-Ordovician boundary age and duration of the lowest Ordovician Tremadoc Series based on U-Pb zircon dates from Avalonian Wales
Landing, E
Bowring, SA
Davidek, KL
Rushton, AWA
Fortey, RA
Wimbledon, WAP
[J]. GEOLOGICAL MAGAZINE, 2000, 137 (05) : 485 - 494
[2] U-Pb zircon age of an Ordovician tuff in southeast Yukon: implications for the age of the Cambrian-Ordovician boundary
Pigage, L. C.
Crowley, J. L.
Pyle, L. J.
Abbott, J. G.
Roots, C. F.
Schmitz, M. D.
[J]. CANADIAN JOURNAL OF EARTH SCIENCES, 2012, 49 (06) : 732 - 741
[3] DEPOSITION OF THE UPPERMOST CAMBRIAN (CROIXAN) JORDAN SANDSTONE, AND THE NATURE OF THE CAMBRIAN-ORDOVICIAN BOUNDARY IN THE UPPER MISSISSIPPI VALLEY
RUNKEL, AC
[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 1994, 106 (04) : 492 - 506
[4] Lingulate brachiopods from the Cambrian-Ordovician boundary beds of Utah
Popov, LE
Holmer, LE
Miller, JF
[J]. JOURNAL OF PALEONTOLOGY, 2002, 76 (02) : 211 - 228
[5] SHRIMP U-Pb Age of Zircon from Precambrian - Cambrian Boundary in the Meishucun Section
Wang, Yin-Xi
Wang, Yuan-Yuan
Zhang, Kai-Jun
Li, Hui-Ming
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 2009, 73 (13) : A1415 - A1415
[6] Geochronology of the Cambrian: a precise Middle Cambrian U-Pb zircon date from the German margin of West Gondwana
Landing, Ed
Geyer, Gerd
Buchwaldt, Robert
Bowring, Samuel A.
[J]. GEOLOGICAL MAGAZINE, 2015, 152 (01) : 28 - 40
[7] Conodonts from the Cambrian-Ordovician Boundary in the Cordillera Oriental, NW Argentina
Albanesi, Guillermo L.
Eugenia Giuliano, M.
Pacheco, Fernanda E.
Ortega, Gladys
Ruben Monaldi, C.
[J]. STRATIGRAPHY, 2015, 12 (3-4): : 237 - 256
[8] A U-Pb age for the Cambrian Taylor Formation, Antarctica:: Implications for the Cambrian time scale
Encarnación, J
Rowell, AJ
Grunow, AM
[J]. JOURNAL OF GEOLOGY, 1999, 107 (04): : 497 - 504
[9] U-Pb zircon date from Avalonian Cape Breton Island and geochronologic calibration of the early Ordovician
Landing, E
Bowring, SA
Fortey, RA
Davidek, KL
[J]. CANADIAN JOURNAL OF EARTH SCIENCES, 1997, 34 (05) : 724 - 730
[10] A NEW ANISOGRAPTUS FAUNULE FROM THE GOODWIN FORMATION (TREMADOC, EARLY ORDOVICIAN) OF CENTRAL NEVADA AND THE CAMBRIAN-ORDOVICIAN BOUNDARY
ERDTMANN, BD
COMEAU, DJ
[J]. JOURNAL OF PALEONTOLOGY, 1980, 54 (04) : 719 - 727

← 1 2 3 4 5 →