Neoproterozoic glaciation in the mid-oceanic realm: An example from hemi-pelagic mudstones on Llanddwyn Island, Anglesey, UK

T. Kawai, B. F. Windley, M. Terabayashi, H. Yamamoto, Y. Isozaki, S. Maruyama

Research output: Contribution to journalArticle

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We report the first occurrence of ice-rafted dropstones in mid-oceanic sediments belonging to an ocean plate stratigraphy within a Neoproterozoic accretionary complex on Llanddwyn Island, Wales, UK. Dropstones of sandstone, chert, and basalt occur as matrix-supported exotic clasts in a 1 m-thick, hemi-pelagic mafic mudstone; the largest clast is 20 × 25 cm across. These dropstones occur specifically in hemi-pelagic mafic mudstone that is located at the structural top of ocean plate stratigraphy that records a ridge-trench transition; they are supplementary to dropstones associated with extensive tillites reported in shallow marine sequences of continental shelf facies and in back-arc basins.

Original languageEnglish
Pages (from-to)105-114
Number of pages10
JournalGondwana Research
Issue number1-2
Publication statusPublished - Aug 2008
Externally publishedYes



  • Accretionary complex
  • Anglesey
  • Dropstone
  • Neoproterozoic
  • Pelagic sediment

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

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