OXYGEN AND CARBON ISOTOPE STRATIGRAPHY OF THE PALEOGENE AND CRETACEOUS LIMESTONES IN THE BOTTACCIONE GORGE AND THE CONTESSA HIGHWAY SECTIONS, UMBRIA, ITALY

被引：72

作者：

CORFIELD, RM

CARTLIDGE, JE

PREMOLISILVA, I

HOUSLEY, RA

机构：

[1] Department of Earth Sciences, University of Oxford, Oxford, OX13PR, Park's Road

[2] Dipartimento di Scienze della Terra, Universita di Milano, Milano, 20133, via Mangiagalli

[3] Radiocarbon Accelerator Unit, Research Laboratory for Archaeology and the History of Art, University of Oxford, OX13QJ

来源：

TERRA NOVA | 1991年 / 3卷 / 04期

关键词：

D O I：

10.1111/j.1365-3121.1991.tb00171.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have made oxygen and carbon isotope measurements on limestone samples of Albian to Eocene age recovered from the Bottaccione Gorge section in the Umbrian Apennines, central Italy. Additional measurements have been made on topmost Maastrichtian and Palaeocene sediments from the adjacent Contessa Highway section. Our data from the Bottaccione Gorge show C-13 maxima at the Cenomanian/Turonian boundary and during the Palaeocene, as well as a pronounced C-13 minimum 7 metres above the clay layer at the K/T boundary. Our data from the Contessa Highway show a C-13 minimum 9 metres above the K/T boundary clay. These minima are probably diagenetic artifacts. In the Bottaccione Gorge there is evidence for a hiatus in the early Middle Eocene. The Palaeocene of the Bottaccione Gorge appears to have been affected by slumping or faulting (in addition to the diagnetic overprinting) giving a spurious delta-C-13 recovery after the K/T boundary, the Contessa Highway section appears to be more complete. The Coniacian-Maastrictian is characterized by relatively stable C-13 values. Our data indicate an increase in delta-O-18 (and therefore possible cooling) across the Cretaceous/Tertiary boundary in both Bottaccione and Contessa Highway sections.

引用

页码：414 / 422

页数：9

共 27 条

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