The Cretaceous–Palaeogene boundary at Gorgonilla Island, Colombia, South America
The Cretaceous–Palaeogene boundary at Gorgonilla Island, Colombia, South America
复制标题
南美洲哥伦比亚戈尔戈尼拉岛的白垩纪-古近纪边界
作者:
Bermúdez;García;Stinnesbeck;Keller. G;Rodríguez. J.V;Schwarz;Trieloff;Bolívar
The discovery of a new Cretaceous/Palaeogene (K/Pg) bathyal marine sequence on Gorgonilla Island, SW Colombia, extends the presence of Chicxulub impact spherule deposits to the Pacific region of northern South America and to the Eastern Pacific Ocean. The Gorgonilla spherule layer is approximately 20 mm thick and consists of extraordinarily well‐preserved glass spherules up to 1.1 mm in diameter. About 70–90% of the spherules are vitrified, and their chemical composition is consistent with Haiti (Beloc) impact glass spherules. Normal size‐grading, delicate spherule textures, welded melt components and an absence of bioturbation or traction transport suggest that the Gorgonilla spherule layer represents an almost undisturbed settling deposit.
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影响因子:
1.8
作者:
G. Keller;T. Adatte;W. Stinnesbeck;M. Affolter;Lionel Schilli;J. López
通讯作者:
J. López
影响因子:
64.8
作者:
G. Keller;T. Abramovich;T. Adatte;Z. Berner
通讯作者:
Z. Berner
影响因子:
64.8
作者:
H. Sigurdsson;H. Sigurdsson;P. Bonté;L. Turpin;M. Chaussidon;N. Métrich;M. Steinberg;P. Pradel;S. D’Hondt
通讯作者:
S. D’Hondt
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
L. Kennan;J. Pindell
通讯作者:
J. Pindell
影响因子:
--
作者:
G. Izett
通讯作者:
G. Izett