Discussion on a late Vendian age for the Kinlochlaggan Boulder Bed (Dalradian)
Article Abstract:
R.H.S. Evans and P.W.G. Tanner proposed the stratigraphic correlation of the Port Askaig Tillite Formation with the Kinlochlaggan Boulder Bed (KBB). Evans' and Tanner's main suggestion, however, is composed of the structural and stratigraphical positions of KBB which they claim lies in an inverted position in correlation with the lower part of the Argyll Group and the upper part of the Appin. This position is a direct reversal of the original interpretation which describes the KBB in an upward-facing succession in correlation with the lower part of the Appin.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1997
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Discussion on a sequence-stratigraphic interpretation of a mudstone-dominated succession: the Lower Jurassic Cleveland Ironstone Formation, UK
Article Abstract:
J.H.S. Macquaker and K.G. Taylor's discussion of the presence of sediment microfabrics at the Lower Jurassic Cleveland Ironstone Formation and their conclusion regarding sequence stratigraphy require a closer examination. Some samples are not convincing and susceptible to bias due to their small size and number. However, the petrographic approach suggested by Taylor and Macquaker deserve a more extensive analysis to substantiate some of their claims.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1997
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Discussion on estimates of the amount and rate of sea-level change across the Rhaetian-Hettangian and Pliensbachian-Toarcian boundaries (latest Triassic to Early Jurassic)
Article Abstract:
The Yorkshire Jet Rock is given a duration of c. 630,000 years, based on the fact that it lasts one ammonite subzone. An annual origin for ammonite horizons is shown to be plausible with the correction of A. Hallam's arithmetical error. The total number of Jet Rock laminae is found to be less than the time in years, thus entertaining the possibility that the laminae could be annual.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1998
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