The Global Boundary Stratotype and Section Point (GSSP) for the Base of the Santonian Stage, "Cantera de Margas", Olazagutia, Northern Spain

The GSSP for the base of the Santonian Stage is defined at 94.4 m in the eastern border of the "Cantera de Margas" quarry, Olazagutia (Navarra, N. Spain: 42o 52' 05.3" N, 2o 11' 40" W) and marked by the first occurrence (FO) of the inoceramid bivalve Platyceramus undulatoplicatus. This first occurrence is located about 9 m below the contact between a lower marly unit and an upper more calcareous unit. The FO of the planktonic foraminifer Sigalia carpatica is the secondary marker of the GSSP and first occurs 7 m below the primary marker, but it becomes consistently present about 4.2 m above the boundary. In addition, six peaks in the carbon stable isotope curve can be recognized between the Kingsdown Event 17.2 m below and the Bedwell Event 12.35 m above the GSSP. The basal Santonian GSSP was approved by the International Subcommission on Cretaceous Stratigraphy in September 2010, by the International Commision of Stratigraphy in April 2012, and ratified by the International Union of Geological Sciences in January 2013.

[1]  L. Ding,et al.  Upper Cretaceous inter-hemispheric correlation between the Southern Tethys and the Boreal: chemo- and biostratigraphy and paleoclimatic reconstructions from a new section in the Tethys Himalaya, S-Tibet , 2011 .

[2]  R. Norris,et al.  Campanian – Maastrichtian carbon isotope stratigraphy: shelf-ocean correlation between the European shelf sea and the tropical Pacific Ocean , 2010 .

[3]  T. Yamanaka,et al.  High-resolution terrestrial carbon isotope and planktic foraminiferal records of the Upper Cenomanian to the Lower Campanian in the Northwest Pacific , 2010 .

[4]  C. Paul,et al.  Testing the precision of bioevents , 2009, Geological Magazine.

[5]  B. Sageman,et al.  Cyclostratigraphy of the Upper Cretaceous Niobrara Formation, Western Interior, U.S.A.: A Coniacian–Santonian orbital timescale , 2008 .

[6]  W. Sissingh.  Biostratigraphy of Cretaceous calcareous nannoplankton , 2007 .

[7]  A. Gale,et al.  An integrated study (inoceramid bivalves, ammonites, calcareous nannofossils, planktonic foraminifera, stable carbon isotopes) of the Ten Mile Creek section, Lancaster, Dallas County, north Texas, a candidate Global boundary Stratotype Section and Point , 2007 .

[8]  M. Melinte,et al.  Calcareous nannofossil biostratigraphy of the Coniacian/Santonian boundary interval in Romania and comparison with other European regions , 2007 .

[9]  G. López,et al.  Macrofauna of the Cantera de Margas section, Olazagutia: Coniacian/Santonian boundary, Navarro-Cantabrian Basin, northern Spain , 2007 .

[10]  D. Peryt,et al.  Neoflabellinids (benthic foraminifers) from the Upper Coniacian and Lower Santonian at Olazagutia, Navarra province, Spain; taxonomy and correlation potential , 2007 .

[11]  D. Peryt,et al.  Planktonic foraminiferal bioevents in the Coniacian/Santonian boundary interval at Olazagutia, Navarra province, Spain , 2007 .

[12]  A. V. Dhondt,et al.  Stratigraphy of the Coniacian–Santonian transition , 2007 .

[13]  A. Gale,et al.  Calcareous nannofossil and planktonic foraminiferal biostratigraphy of proposed stratotypes for the Coniacian/Santonian boundary: Olazagutía, northern Spain; Seaford Head, southern England; and Ten Mile Creek, Texas, USA , 2007 .

[14]  I. Jarvis,et al.  Secular variation in Late Cretaceous carbon isotopes: a new δ13C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma) , 2006, Geological Magazine.

[15]  A. Gale,et al.  Carbon- and oxygen-isotope stratigraphy of the English Chalk and Italian Scaglia and its palaeoclimatic significance , 1994, Geological Magazine.

[16]  O. Varol.  Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy , 1992 .

[17]  J. Hancock.  Ammonite scales for the Cretaceous system , 1991 .

[18]  W. Kennedy,et al.  Santonian ammonite stratigraphy of the Münster Basin, NW Germany , 2000 .

[19]  M. Melinte.  Turonian-Coniacian nannofossil events in the east and south Carpathians (Romania) , 1999 .

[20]  Danuta Peryt,et al.  Datos micropaleontológicos preliminares sobre el límite Coniaciense-Santoniense en Olazagutía (Navarra, España) , 1999 .

[21]  J. Wiedmann,et al.  Sequence Stratigraphy on a Carbonate Ramp: The Late Cretaceous Basco-Cantabrian Basin (Northern Spain) , 1998 .

[22]  P. Rawson,et al.  Cretaceous Stage Boundaries — Proposals , 1990 .

[23]  T. Engeser,et al.  Plattentektonik, Fazies- und Subsidenzgeschichte des basko-kantabrischen Kontinentalrandes während Kreide und Alttertiär , 1982 .

[24]  H. Thierstein.  Late Cretaceous Nannoplankton and the Change at the Cretaceous Tertiary Boundary , 1981 .

[25]  H. Thierstein.  Mesozoic calcareous nannoplankton biostratigraphy of marine sediments , 1976 .

[26]  J. Ramirez.  Bioestratigrafía y microfacies del Jurásico y Cretácico del Norte de España (región cantábrica) , 1969 .