New information on the Dinantian stratigraphy and structure of Tynedale, Northumberland

Frost, D. V.

doi:10.1144/pygs.45.1-2.45

PYGS

1984

DOI: 10.1144/pygs.45.1-2.45

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New information on the Dinantian stratigraphy and structure of Tynedale, Northumberland

D. V. Frost

Abstract: SUMMARY The Northumberland Trough is dominated by numerous east-north-eastward trending Caledonoid faults. A recent geophysical survey has indicated the presence of another dislocation of similar trend, but this is related to the Whin Sill and its associated dykes and probably acted as an important feeder in the Roman Wall area. New boreholes in the Settlingstones-Newbrough area show the Whin Sill to be intruded at an horizon close below the Colwell (=Single Post) Limestone, and confirm the… Show more

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Cited by 3 publications

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Carboniferous biostratigraphy of the Rookhope Borehole, Co. Durham

Johnson

Nudds

1995

Transactions of the Royal Society of Edinburgh: Earth Sciences

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A deep borehole drilled at Rookhope in Weardale, Co. Durham in 1960–61 proved the Weardale Granite below Carboniferous sediments at a depth of 390 m; an account of the Carboniferous rocks is presented. The boring commenced in the basal Namurian Great Limestone and entered the Dinantian at the bottom of the limestone at 25 m. Most of the ten Brigantian cyclothems sectioned in the borehole are compound and average 30 m thick. They consist of an initial cycle often more than 20 m thick and overlying minor cycles that are usuallyless than 6 m thick. Each of the cycles, both initial and minor, are coarsening upwards sequences from marine limestone or mudstohe to deltaic and fluvial mudstone, sandstone, seatearth and occasionally a thin coal seam. The underlying Asbian consists of seven cyclothems averaging 8 m thick. By contrast they are simple coarsening upwards sequences similar to the Brigantian initial cycles, but no minor cycles are developed.Marine fossils are abundant in the majority of cyclothems and are listed against their stratigraphical horizon in the borehole. Special studies of miospores, conodonts and foraminiferans from the borehole are presented. A consensus of biostratigraphical evidence shows that the base of the Carboniferous succession in the borehole is of early Asbian age.

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Carboniferous biostratigraphy of the Rookhope Borehole, Co. Durham

Johnson

Nudds

1995

Transactions of the Royal Society of Edinburgh: Earth Sciences

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Parasequence-scale organic facies variations through an Early Carboniferous Yoredale cyclothem, Middle Limestone Group, Scremerston, Northumberland

Frank

Tyson

1995

JGS

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The Early Carboniferous (Brigantian) Middle Limestone Group of Northumberland represents a prolonged period of rhythmic Yoredale-type deltaic sedimentation. Optical and geochemical analyses were undertaken on the minor Berwick Limestone Cyclothem, a prograding coarsening- and shallowing-upward cycle (parasequence) within the major Oxford Limestone Cyclothem. These indicate an overwhelming dominance of Type III–IV land-plant derived kerogen (woody phytoclasts). The hydrogen index shows a strong negative correlation with the palynologically determined b1ack: brown phytoclast ratio. The total organic carbon content of the fine-grained lithologies increases upwards through the cycle and is positively correlated with silt content, presumably due to the hydrodynamic equivalence and common fluvial source of phytoclasts and silt particles. The 1ath:equant ratio of the black phytoclasts increases upwards through the cycle (i.e. in a proximal direction); this pattern is ‘atypical’ and results from the lath-shaped phytoclasts being larger than the equant ones. The section is marginally mature (about 0.64% vitrinite reflectance); reflectance is correlated with hydrogen index. The distribution of pyrite and siderite is apparently related to sediment accumulation rate, with siderite most common in the interval of probable highest sedimentation in the lower half of the cyclothem above the limestone. The marine flooding surface at the base of the cycle is overlain by black shale, not limestone; the traditional (limestone) base of the cyclothem does not correspond to the true base.

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The contribution of publications of the Yorkshire Geological Society to the understanding of the geological development of the Carboniferous Pennine Basin, northern England

Waters

Holliday²,

Chisholm

2020

PYGS

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The Carboniferous rocks of the Pennine Basin form the topographical spine of the region between the Scottish Border and the Peak District. They provided many of the mineral resources that fuelled the Industrial Revolution and the growth of the great northern English cities. The description of these resources was very much a focus of early papers in the Proceedings, but they went beyond the assessment of their economic importance, providing striking early insights into our understanding of deep time when the Bible still had a strong control on scientific thinking. Over a 180 year history of publication, the Proceedings and Occasional Publications contain an unparalleled description of the rocks of the Pennine Basin of Carboniferous deposition, and they continue to provide great insight into what have been intensively studied successions but of which much still remains to be learned. This review considers the relevance of these publications to our understanding of the sedimentology of Carboniferous strata, the geometries of Carboniferous basins, how these basins constrained the formation of reefs and controlled the movement of rivers and deltas in the process of eventual infill of these basins, and how sea-level variations influenced the development of cyclical successions, the hallmark of much of the Carboniferous succession.

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New information on the Dinantian stratigraphy and structure of Tynedale, Northumberland

Cited by 3 publications

References 7 publications

Carboniferous biostratigraphy of the Rookhope Borehole, Co. Durham

Carboniferous biostratigraphy of the Rookhope Borehole, Co. Durham

Parasequence-scale organic facies variations through an Early Carboniferous Yoredale cyclothem, Middle Limestone Group, Scremerston, Northumberland

The contribution of publications of the Yorkshire Geological Society to the understanding of the geological development of the Carboniferous Pennine Basin, northern England

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