The Cretaceous-Palaeogene boundary at Gorgonilla Island, Colombia, South America

Hermann D. Bermúdez; Jenny García; Wolfgang Stinnesbeck; Gerta Keller; José Vicente Rodríguez; Michael Hanel; Jens Hopp; Winfried H. Schwarz; Mario Trieloff; Liliana Bolívar; Francisco J. Vega

doi:10.1111/ter.12196

The Cretaceous-Palaeogene boundary at Gorgonilla Island, Colombia, South America

Hermann D. Bermúdez, Jenny García, Wolfgang Stinnesbeck, Gerta Keller, José Vicente Rodríguez, Michael Hanel, Jens Hopp, Winfried H. Schwarz, Mario Trieloff, Liliana Bolívar, Francisco J. Vega

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20 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	83-90
Number of pages	8
Journal	Terra Nova
Volume	28
Issue number	1
DOIs	https://doi.org/10.1111/ter.12196
State	Published - Feb 1 2016

All Science Journal Classification (ASJC) codes

Geology

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10.1111/ter.12196

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abstract = "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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AU - Stinnesbeck, Wolfgang

AU - Keller, Gerta

AU - Rodríguez, José Vicente

AU - Hanel, Michael

AU - Hopp, Jens

AU - Schwarz, Winfried H.

AU - Trieloff, Mario

AU - Bolívar, Liliana

AU - Vega, Francisco J.

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AB - 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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The Cretaceous-Palaeogene boundary at Gorgonilla Island, Colombia, South America

Abstract

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