Additions to the non‐marine fauna of the lower coal measures of the North‐Midlands Coalfields

Eagar, R. M. C.

doi:10.1002/gj.3350010403

Cited by 12 publications

(3 citation statements)

References 18 publications

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“…At Kirkheaton, however, elongate Carbonicola aff. communis Davies & Trueman, including shells closely approaching C. antiqua (Brown), have been found with Naiadites and rare Anthraconuia in calcareous siltstones 18.3 m below the Better Bed, and a similar nonmarine fauna was collected in carbonate-rich sandstone at Raistrick, near Huddersfield (Eagar 1956 :354-355). The same horizon, or one near it, was represented in an exposure at Roseville Road Brick Pit, central Leeds (Fig.…”

Section: Measures Between the 80-yard Coal And The Better Bedmentioning

confidence: 96%

Shape of shell of Carbonicola in relation to burrowing

Eagar

1974

LET

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In the British Pennines, from the middle of the lenisulcata Zone to the lower part of the communis Zone (Upper Carboniferous, lower Westphalian A), nine horizons, of which six are new or newly described, yield elongate specimens of the bivalve Carbonicola with evidence of former steep, near vertical burrowing in sediments of low organic carbon content. The faunas, of the groups of C. bellula (Bolton) sensu lato and of elongate C. aff. communis Davies & Trueman, were evidently invaders of the Pennine prodelta. They grade with established faunas of prolific highly variable Carbonicola found typically in richly carbonaceous shales and characterised by shallow burrowing, greater size, increased prcportionate shell height and length of anterior end, and probably increased obesity. Parallels exist with work on Anthraconaia. Anthraconauta. and the ecology of recent Unionacea. Results also bear on the palaeoecological ranges of Curvirimula and Naiadites.

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Section: Measures Between the 80-yard Coal And The Better Bedmentioning

confidence: 96%

Shape of shell of Carbonicola in relation to burrowing

Eagar

1974

LET

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“…The base of the Cleaver Formation is identified by the Maltby MB Onshore sections in the Pennine Basin contain several thin marine bands indicating small marine incursions throughout the equivalents of the Cleaver Formation (Calver, 1968). In the lower part of the Duckmantian the flooding surfaces are lacustrine rather than marine, as is evident from the fossil record (Trueman and Weir, 1946;Calver, 1956;Eagar, 1954;O'Mara & Turner 1997). Several timescales estimates, varying between 1.2 and 2.5 Myr, can be used for the duration between the formation of the Vanderbeckei MB and the Aegiranum MB (Davydov et al, 2004;Menning et al, 2006;Van der Belt et al, 2015;Opluštil et al, 2016).…”

Section: Geological Settingmentioning

confidence: 99%

A cyclostratigraphic framework of the Upper Carboniferous Westoe and Cleaver formations in the southern North Sea Basin as a methodology for stratigraphic reservoir characterisation

Baars

Veld²,

Zhang

et al. 2023

Netherlands Journal of Geosciences

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Orbital driven climate control on sedimentation produces regional, stratigraphically repetitive characters and so cyclostratigraphic correlation can improve correlation and identify stratigraphic trends in borehole sections. This concept is commonly used to correlate marine and lacustrine strata. However, in the alluvial domain, its use is more challenging because internal, local dynamics controlling sedimentation may interfere with the expression of cyclic climate forcing. Intervals of low net-to-gross may be important for successful application in this domain as they tend to better document regional changes. This study applies climate-based stratigraphic correlation concepts to improve well correlations, characterise vertical sand distribution, and identify potential reservoir targets in a generally low net-to-gross interval. Coarsening upward sedimentary repetitions (cyclothems) are identified and correlated with high certainty in nineteen well sections in the upper Carboniferous Westoe and Cleaver formations of the Silverpit Basin. Local sedimentary dynamics provide variability in the character of the cyclothems and several types of cyclothem are classified. Correlation of sections using cyclothems recognised on wireline logs is done twice: once manually and once semi-automatically. The semi-automated correlation is based on calculation of deviation curves which depict stratigraphic changes that are less dependent on absolute wireline values and follow vertical trends more clearly. The correlations provide composite stratigraphies that are analysed using vertical proportions curves. Both approaches yield similar results in terms of stratigraphic trends. However, for detailed correlation of wells, the manual correlation is better at accounting for any local variability within the system. The same two zones of higher net-to-gross ratios are found using both correlation methods. These are linked to palaeoclimatic changes driven by long eccentricity and the proposed climate stratigraphic model has predictive value for identifying sandstone occurrence. The climate-based stratigraphic correlation improves the assessment reservoir distribution and properties on small (10–20 m thickness) and large (100–200 m thickness) stratigraphical scales.

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“…In the west Pennine area the Daubhill fauna is known in Lancashire and north Staffordshire (Magraw, 1957;Eagar, 1956;Melville, 1947) but has not been positively identified in the intervening Cheshire area, though the sequence below the Arley Coal does contain mussel bands (Taylor, Price & Trotter, 1963, pp. 34, 41).…”

Section: C Faunasmentioning

confidence: 99%

The Upper Band-Better Bed sequence (Lower Coal Measures, Westphalian A) in the central and south Pennine area of England

Chisholm¹

1990

Geol. Mag.

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An analysis of outcrop and borehole information relating to the strata between the Upper Band and Better Bed coals of the central and south Pennines shows that two lithological facies can be recognized within a cyclic sequence of mudstones, siltstones and sandstones. In one facies, sandstones and siltstones contain abundant mica, and argillaceous beds are neutral grey in colour. Petrographically the sandstones are feldspathic but contain little lithic material other than multigrain quartz. In the other facies, mica is much less common, argillaceous beds are greenish grey, and sandstones and siltstones contain a notable proportion of chloritic lithoclasts. The sediments of both facies were deposited in lower delta plain/shallow-water delta environments, and palaeocurrent measurements show that the micaceous facies was supplied from the north or east while the green facies came in from the west.Three named divisions of the sequence are based on recognition of the two facies types. They correspond roughly with three upward-coarsening transgressive–regressive sedimentary cycles of presumed eustatic origin. In the lowest part of the succession (Shibden division) the main clastic input was of the micaceous type. Sandstones are found only in the north of the basin, where they form a series of superimposed delta-front bodies. Mudstones were deposited elsewhere, in a large body of open water which, although linked to the sea, was generally of lowered salinity. The restriction of the delta-front sandstones to the same geographical area over a long period of time is attributed to differential subsidence of the basin across deep-seated structures.The sediments of the overlying Brighouse division belong to the green facies, and the source of the elastics lay to the west. After an initial period of mudstone deposition in an extensive, apparently non-marine, body of open water, fluviodeltaic sand and silt spread across the entire area. There is no obvious control of sandstone distribution by basement structures.The succeeding Bradley Wood division includes sediments of both micaceous and green facies. A lobe of medium-grained micaceous sandstone around Sheffield (Thurlstone Channel) represents a fluvial incursion from the east and a linear body of fine-grained green-facies sandstone south of Chesterfield (Bole Hill Channel) represents a similar incursion from the west. Elsewhere, small units of finer-grained elastics are probably deltaic deposits linked to the same sources. The location of the channel sand-bodies suggests control by deep-seated fractures.

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Additions to the non‐marine fauna of the lower coal measures of the North‐Midlands Coalfields

Cited by 12 publications

References 18 publications

Shape of shell of Carbonicola in relation to burrowing

Shape of shell of Carbonicola in relation to burrowing

A cyclostratigraphic framework of the Upper Carboniferous Westoe and Cleaver formations in the southern North Sea Basin as a methodology for stratigraphic reservoir characterisation

The Upper Band-Better Bed sequence (Lower Coal Measures, Westphalian A) in the central and south Pennine area of England

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