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

Ahlberg, Anders LU ; Herman, AB; Raikevich, M; Rees, A and Spicer, RA (2002) In GFF 124(4). p.197-199
Abstract
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.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Russia, dropstones, lonestones, Cretaceous
in
GFF
volume
124
issue
4
pages
197 - 199
publisher
Geological Society of Sweden
external identifiers
  • wos:000181306200003
  • scopus:3843133246
ISSN
2000-0863
DOI
10.1080/11035890201244197
language
English
LU publication?
yes
id
3e4a8302-59bd-41a9-adef-46cb753649d0 (old id 317332)
date added to LUP
2007-08-06 13:33:35
date last changed
2017-01-01 04:43:26
@article{3e4a8302-59bd-41a9-adef-46cb753649d0,
  abstract     = {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.},
  author       = {Ahlberg, Anders and Herman, AB and Raikevich, M and Rees, A and Spicer, RA},
  issn         = {2000-0863},
  keyword      = {Russia,dropstones,lonestones,Cretaceous},
  language     = {eng},
  number       = {4},
  pages        = {197--199},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {Enigmatic Late Cretaceous high palaeo-latitude lonestones in Chukotka, northeasternmost Asia},
  url          = {http://dx.doi.org/10.1080/11035890201244197},
  volume       = {124},
  year         = {2002},
}