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

doi:10.1016/j.gr.2007.12.008

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 journal › Article › peer-review

32 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	105-114
Number of pages	10
Journal	Gondwana Research
Volume	14
Issue number	1-2
DOIs	https://doi.org/10.1016/j.gr.2007.12.008
Publication status	Published - Aug 2008

Keywords

Accretionary complex
Anglesey
Dropstone
Neoproterozoic
Pelagic sediment

ASJC Scopus subject areas

Geology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.gr.2007.12.008

Cite this

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

abstract = "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.",

keywords = "Accretionary complex, Anglesey, Dropstone, Neoproterozoic, Pelagic sediment",

author = "T. Kawai and Windley, {B. F.} and M. Terabayashi and H. Yamamoto and Y. Isozaki and S. Maruyama",

year = "2008",

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doi = "10.1016/j.gr.2007.12.008",

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T2 - An example from hemi-pelagic mudstones on Llanddwyn Island, Anglesey, UK

AU - Kawai, T.

AU - Windley, B. F.

AU - Terabayashi, M.

AU - Yamamoto, H.

AU - Isozaki, Y.

AU - Maruyama, S.

PY - 2008/8

Y1 - 2008/8

N2 - 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.

AB - 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.

KW - Accretionary complex

KW - Anglesey

KW - Dropstone

KW - Neoproterozoic

KW - Pelagic sediment

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

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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