Reassessing classic evidence for warm-based Cryogenian ice on the western Laurentian margin : The “striated pavement” of the Mineral Fork Formation, USA. / Vandyk, Thomas Matthew; Kettler, Christoph; Davies, Bethan; Shields-Zhou, Graham; Candy, Ian; Daniel Paul, Le Heron .

In: Precambrian Research, Vol. 363, 106345, 01.09.2021.

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Reassessing classic evidence for warm-based Cryogenian ice on the western Laurentian margin : The “striated pavement” of the Mineral Fork Formation, USA. / Vandyk, Thomas Matthew; Kettler, Christoph; Davies, Bethan; Shields-Zhou, Graham; Candy, Ian; Daniel Paul, Le Heron .

In: Precambrian Research, Vol. 363, 106345, 01.09.2021.

Research output: Contribution to journalArticlepeer-review

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@article{375046a2a56440659f75c4b43215bd36,
title = "Reassessing classic evidence for warm-based Cryogenian ice on the western Laurentian margin: The “striated pavement” of the Mineral Fork Formation, USA",
abstract = "Determining the extent and nature of ancient glacial deposits is fundamental to understanding Earth{\textquoteright}s climate in the Cryogenian Period. Although the detailed study of sedimentary facies has allowed significant insights, it typically fails to produce high confidence interpretations for the past position of grounded ice, its thermal regime and flow direction, which are of fundamental importance to any glaciological reconstruction. When correctly identified, Cryogenian subglacially striated surfaces (pavements) unequivocally indicate grounded ice, a warm-based thermal regime and flow direction. However, they are globally rare and open to misinterpretation. Despite a discontinuous belt of Cryogenian strata, stretching thousands of kilometres from Alaska to California, the only purported Cryogenian pavements from the North American continent or the western margin of the Laurentian palaeocontinent occur in the Big Cottonwood Canyon area, Utah. We critically reappraise the only uncontested pavement from this area, presenting a detailed description derived from new high resolution photogrammetry and traditional field observations. These suggest that the purported pavement is unlikely to be a Cryogenian feature, but is instead a recent erosional phenomenon consistent with other structurally controlled features within the surrounding modern landscape. Our reinterpretation questions whether grounded Cryogenian ice reached the Utah – Idaho region and requires that the previously irrefutable interpretation of a glacial influence in the lowermost Mineral Fork Formation be reconsidered, allowing for a transition into Cryogenian glaciation. ",
author = "Vandyk, {Thomas Matthew} and Christoph Kettler and Bethan Davies and Graham Shields-Zhou and Ian Candy and {Daniel Paul}, {Le Heron}",
year = "2021",
month = sep,
day = "1",
doi = "10.1016/j.precamres.2021.106345",
language = "English",
volume = "363",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Reassessing classic evidence for warm-based Cryogenian ice on the western Laurentian margin

T2 - The “striated pavement” of the Mineral Fork Formation, USA

AU - Vandyk, Thomas Matthew

AU - Kettler, Christoph

AU - Davies, Bethan

AU - Shields-Zhou, Graham

AU - Candy, Ian

AU - Daniel Paul, Le Heron

PY - 2021/9/1

Y1 - 2021/9/1

N2 - Determining the extent and nature of ancient glacial deposits is fundamental to understanding Earth’s climate in the Cryogenian Period. Although the detailed study of sedimentary facies has allowed significant insights, it typically fails to produce high confidence interpretations for the past position of grounded ice, its thermal regime and flow direction, which are of fundamental importance to any glaciological reconstruction. When correctly identified, Cryogenian subglacially striated surfaces (pavements) unequivocally indicate grounded ice, a warm-based thermal regime and flow direction. However, they are globally rare and open to misinterpretation. Despite a discontinuous belt of Cryogenian strata, stretching thousands of kilometres from Alaska to California, the only purported Cryogenian pavements from the North American continent or the western margin of the Laurentian palaeocontinent occur in the Big Cottonwood Canyon area, Utah. We critically reappraise the only uncontested pavement from this area, presenting a detailed description derived from new high resolution photogrammetry and traditional field observations. These suggest that the purported pavement is unlikely to be a Cryogenian feature, but is instead a recent erosional phenomenon consistent with other structurally controlled features within the surrounding modern landscape. Our reinterpretation questions whether grounded Cryogenian ice reached the Utah – Idaho region and requires that the previously irrefutable interpretation of a glacial influence in the lowermost Mineral Fork Formation be reconsidered, allowing for a transition into Cryogenian glaciation.

AB - Determining the extent and nature of ancient glacial deposits is fundamental to understanding Earth’s climate in the Cryogenian Period. Although the detailed study of sedimentary facies has allowed significant insights, it typically fails to produce high confidence interpretations for the past position of grounded ice, its thermal regime and flow direction, which are of fundamental importance to any glaciological reconstruction. When correctly identified, Cryogenian subglacially striated surfaces (pavements) unequivocally indicate grounded ice, a warm-based thermal regime and flow direction. However, they are globally rare and open to misinterpretation. Despite a discontinuous belt of Cryogenian strata, stretching thousands of kilometres from Alaska to California, the only purported Cryogenian pavements from the North American continent or the western margin of the Laurentian palaeocontinent occur in the Big Cottonwood Canyon area, Utah. We critically reappraise the only uncontested pavement from this area, presenting a detailed description derived from new high resolution photogrammetry and traditional field observations. These suggest that the purported pavement is unlikely to be a Cryogenian feature, but is instead a recent erosional phenomenon consistent with other structurally controlled features within the surrounding modern landscape. Our reinterpretation questions whether grounded Cryogenian ice reached the Utah – Idaho region and requires that the previously irrefutable interpretation of a glacial influence in the lowermost Mineral Fork Formation be reconsidered, allowing for a transition into Cryogenian glaciation.

U2 - 10.1016/j.precamres.2021.106345

DO - 10.1016/j.precamres.2021.106345

M3 - Article

VL - 363

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

M1 - 106345

ER -