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Enigmatic Late Cretaceous high palaeo-latitude lonestones in Chukotka, northeasternmost Asia

In English

Författare

Summary, in English

Well-rounded cobbles were encountered within a low-energy restricted marine organic-rich deposit of latest Cretaceous age in Chukotka, NE Asia. The clasts are hydrodynamically incompatible with the inferred quiet depositional environment of the host sediment. Driftwood capable of tree-rafting, glacial striations, gastrolith clast clustering, and disrupting clast impact impressions typical of volcanic ejecta were absent, as were signs of traction currents. If indeed ice-rafting is responsible, this supports recent climate models and palaeobotanical data which favour seasonal marine ice cover of high northern latitudes over a wide span of boundary conditions.

Publiceringsår

2002

Språk

Engelska

Sidor

197-199

Publikation/Tidskrift/Serie

GFF

Volym

124

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Ämne

  • Geotechnical Engineering

Nyckelord

  • Russia
  • dropstones
  • lonestones
  • Cretaceous

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2000-0863