Note on recent spore and goniatite evidence from the Passage Group, of the Scottish Upper Carboniferous succession

Neves, R.; Read, W. A.; Wilson, R. B.

doi:10.1144/sjg01020185

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…The lower limit is the base of no. 2 Marine Band, which falls within the Arnsbergian (E,) stage and the upper limit is the base of the Netherwood Marine Band (Read &c Dean, 1978), which falls within the Kinderscoutian (R,) stage (Neves, Read & Wilson, 1965). The underlying Namurian deposits of the Limestone Coal Group and Upper Limestone Group (Pendleian El and lower part of the Arnsbergian, Ez stages), were laid down under dominantly deltaic conditions but were periodically interrupted by widespread, possibly eustatic, marine transgressions.…”

Section: -25 Marine Band N E T H E R W O O D Top Coal a N D M A R Imentioning

confidence: 99%

Quantitative relationships between numbers of fluvial cycles, bulk lithological composition and net subsidence in a Scottish Namurian basin

Read

Dean²

1982

Sedimentology

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This detailed quantitative basin analysis of fluvial deposits in a subsiding Namurian structural basin is aimed at discovering underlying statistical relationships between numbers of fluvial cycles, bulk lithological composition and net subsidence which could be used as a background to future sophisticated computer simulation experiments and would also facilitate comparison with other ancient basins. The succession studied lies between two widespread marine bands, one of Arnsbergian (E2) and one of Kinderscoutian (R1) age, and is dominated by upward‐fining cycles: 94% of the semi‐cycles containing sand, here termed grain‐size cycles, are upward‐fining and the ratio of fine members (mudstone+siltstone) to coarse members ranges from 0·23 to 5·0. Trend‐surface analysis reveals basement structures, which influenced sedimentation, including a Caledonoid graben. Correlation coefficient values and results of principal component analysis demonstrate that the numbers of rooty horizons and grain‐size cycles, together with the total thicknesses of sandstone and of mudstone+siltstone, all tend significantly towards a linear relationship with the total thickness of strata and hence net subsidence. The average thickness of grain‐size cycles tends towards an inverse linear relationship with net subsidence. This probably reflects the presence of stacked, relatively thin, channel‐fills within persistent channel belts. These belts tend to be localized in the areas of greatest subsidence within the basin and follow courses basically similar to channels already discovered in the underlying deltaic sediments. The highest concentrations of mudstone+siltstone tend to lie on the flanks of the basin, but high local sand concentrations found at points on the margin where channels entered the basin from the NW and NE and left to the SW, effectively disrupt any significant relationship between net subsidence and the proportion of sand. Coal has been selectively preserved on the flanks of the basin and the number of rooty horizons is greatest in an area of low subsidence which lay somewhat remote from the main channel belts.

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Section: -25 Marine Band N E T H E R W O O D Top Coal a N D M A R Imentioning

confidence: 99%

Quantitative relationships between numbers of fluvial cycles, bulk lithological composition and net subsidence in a Scottish Namurian basin

Read

Dean²

1982

Sedimentology

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“…2 Marine Band is composed of a series of laterally-impersistent, upwardfining cycles similar to those found in fluvial environments (see below). The theory that these sediments may be fluviatile is of considerable sedimentological and stratigraphical importance as it reveals the sedimentary environment which lay to the landward of the deltaic coal swamps, in the same way that an earlier study of the Black Metals in the Limestone Coal Group revealed the environment which lay to seaward (Read 1965). It is also of economic importance as this part of the Passage Group contains the Lower Fireclays, which provide one of the most important sources of high-alumina refractory clay in Britain.…”

Section: Introductionmentioning

confidence: 84%

“…Muir (1963, p. 468-70) thought that heavy mineral evidence suggested tectonic movement in the Highland source area early in Passage Group times. No unconformity can be detected in the thick Passage Group successions of the area studied (Neves et al 1965;Francis et al in press), but gaps and even angular discordances appear in the more attenuated successions in the southern and western parts of the Midland Valley and it seems possible that the widespread channelling which eroded the Castlecary Limestone can be traced laterally into a definite unconformity (see Macgregor 1937, p. 66, fig. 2;Lumsden 1967, p. 39-41, figs.…”

Section: Depositional Environmentmentioning

confidence: 93%

“…This facies is best developed between the top of No. 2 Marine Band and the Netherwood Coal-a part of the succession thought to lie somewhere between the upper part of the Arnsbergian (E 2 ) and the lower part of the Kinderscoutian (R,) (Neves, Read & Wilson, 1965). Before describing this part of the succession in detail, however, it is necessary to consider the facies and sedimentary environment which had prevailed in the earlier part of Namurian time so that the differences between the two facies can best be appreciated.…”

Section: Introductionmentioning

confidence: 99%

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Fluviatile Deposits in Namurian rocks of Central Scotland

Read¹

1969

Geol. Mag.

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In the Clackmannan Syncline and the north-eastern part of the Central Coalfield the Passage Group succession between No. 2 Marine Band (?Arnsbergian, E 2 ) and the Netherwood Coal (Kinderscoutian, Ri) represents a period when meandering rivers with gently sloping floodplains replaced deltas. The succession consists of upward-fining cycles in which crossstratified sandstones with disconformable bases grade up into unstratified rooty siltstones and mudstones. The thicker sandstones probably represent meander belt deposits, the thinner sandstones the infillings of single channels and the mudstones and siltstones overbank (floodbasin) deposits. Desiccation cracks and partial oxidation phenomena indicate periods of low water table.

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Pennsylvanian (Namurian and Westphalian) miospore assemblages from the west coast of Scotland

McLean¹,

Owens

Pendleton

et al. 2013

Review of Palaeobotany and Palynology

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Note on recent spore and goniatite evidence from the Passage Group, of the Scottish Upper Carboniferous succession

Cited by 10 publications

References 2 publications

Quantitative relationships between numbers of fluvial cycles, bulk lithological composition and net subsidence in a Scottish Namurian basin

Quantitative relationships between numbers of fluvial cycles, bulk lithological composition and net subsidence in a Scottish Namurian basin

Fluviatile Deposits in Namurian rocks of Central Scotland

Pennsylvanian (Namurian and Westphalian) miospore assemblages from the west coast of Scotland

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