Facies relationships in the Upper Devonian‐Lower Carboniferous of southwest Ireland and adjacent regions

Naylor, D.; Jones, Peter Tom; Matthews, Samantha

doi:10.1002/gj.3350090107

Cited by 19 publications

(5 citation statements)

References 12 publications

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“…Intra‐basinal structural highs, which have been postulated from the presence of sections of reduced thickness, probably did not exert much direct influence on facies distribution at this stage, although it is possible that the Glandore High (Naylor et al. , 1974) resulted in a reduction of shelf gradients offshore.…”

Section: Depositional Interpretationmentioning

confidence: 97%

“…Although MacCarthy et al. (1987) suggest that the rather poorly constrained zone of reduced subsidence in south Cork (Graham and Reilly, 1972, 1975b) known as the Glandore High (Naylor et al. , 1974) may reflect the southern margin of the basin, Naylor et al.…”

Section: Geological Settingmentioning

confidence: 99%

“…The Black Ball Member is exposed only in three of the sections analysed (Ballycrovane, Cahermore and Dunworly) but, in each case, is significantly more mud‐prone compared with the underlying section. Although originally included as part of the Reenagough Member (Naylor et al. , 1969, 1974, 1983; Jones, 1974; Williams et al.…”

Section: Depositional Interpretationmentioning

confidence: 99%

“…The term Pigs Cove Member is used here to encompass western parts of the basin and replaces the term Ardnamanagh Member (Naylor et al. , 1969, 1974, 1983; Jones, 1974; Williams et al.…”

Section: Depositional Interpretationmentioning

confidence: 99%

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The evolution of a thick shallow marine succession, the South Munster Basin, Ireland

Quin

2008

Sedimentology

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The relatively fine-grained Late Devonian to Early Carboniferous 'Cork Beds' succession of the South Munster Basin includes continuous sections of paralic facies that are over 1000 m thick and individual sandstone units over 300 m thick. However, the succession does not reflect prolonged phases when facies belts were stationary, but rather multiple stacking of small-scale, highfrequency sequences, each associated with pronounced migration of shorelines. What seems to have been unusual about the South Munster Basin succession was that the geographical positioning of these high-frequency sequences was fixed. This resulted from an unusual combination of tectonics, shelf hydrodynamics, sedimentation rates and the textural maturity of the sediment within the basin. Of these, tectonics was probably most critical, particularly the juxtaposition of rapid subsidence in basinal areas and a basin margin zone (to the north) that was sufficiently up-standing to pin the maximum extent of transgression during repeated highstands of sea-level, yet not so upstanding as to have diverted the major regional drainage system. The embayed palaeogeography of the area may also have been influential.

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Section: Depositional Interpretationmentioning

confidence: 97%

Section: Geological Settingmentioning

confidence: 99%

Section: Depositional Interpretationmentioning

confidence: 99%

“…The term Pigs Cove Member is used here to encompass western parts of the basin and replaces the term Ardnamanagh Member (Naylor et al. , 1969, 1974, 1983; Jones, 1974; Williams et al.…”

Section: Depositional Interpretationmentioning

confidence: 99%

See 2 more Smart Citations

The evolution of a thick shallow marine succession, the South Munster Basin, Ireland

Quin

2008

Sedimentology

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“…There appears to have been no clearly identifiable basin margin fault. However, a structurally positive area, known as the Glandore High (Naylor et al, 1974), marks an area where condensed sequences are present. Originally thought to have had a roughly north-south trend, sedimentological and stratigraphical evidence now indicate that its trend was approximately east-west.…”

Section: Southern Basin Margin and The Glandore Highmentioning

confidence: 99%

The South Munster Basin of southwest Ireland

MacCarthy¹

2007

Journal of Maps

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This paper presents a geological map at a scale of 1:75,000 of an area of about 3,500km 2 of the western part of the Devonian and Carboniferous South Munster Basin of southern Ireland. The compilation utilised existing geological data from a variety of sources in association with recent mapping. Aerial photographic data were used extensively to identify structural features not previously mapped. Geological and selected topographical information were scanned to a computer and the final compilation map was digitised using Macromedia Freehand software at a scale of 1:3,125. The map was subsequently converted to a scale of about 1:75,000.

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The stratigraphy and structure of the Galley Head culmination zone: An area of enhanced shortening related to basin geometry within the Irish Variscides

Ford¹

1990

Geological Journal

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In* southwest Ireland an Upper Devonian to Lower Carboniferous clastic succession was deposited in an ENE-WSW trending half-graben, known as the South Munster Basin. Across the Galley Head peninsula on the south coast, this stratigraphical succession is attenuated due to the presence of a palaeogeographical feature called the Glandore High. Evidence suggests that the Glandore High was an east-west feature, faulted to the north and east, which was part of the southern flank (hangingwall rollover) of the South Munster Basin.During post-Carboniferous Variscan deformation the relatively thin stratigraphy of Galley Head underwent prolonged folding, causing a local periclinal fold pair to develop within the hinge zone of a regional syncline. The main cleavage then developed parallel to bedding on the overturned south limb of the anticline of this fold pair. The local enhanced shortening caused the development of a structural culmination, and south facing, tight to isoclinal folds. The culmination was enhanced and tightened by a fault system of contractional, strike-parallel faults linked by cross faults. Secondary folds occur across the hinges of regional anticlines and also on major fold limbs as isolated fold pairs and in monoclinal fold zones, some of which may have nucleated on irregular sandstone bodies. Local crenulation cleavages are related to late fault movements. Syn-cleavage, conjugate, wrench faults record 10 per cent to 15 per cent strike-parallel extension in the culmination.The deformation chronology of the Galley Head area is somewhat anomalous for the Irish Variscides in that the folds were well established before the onset of the main cleavage development. The enhanced shortening across the area was compartmentalized by major cross faults and a minor component of north-south sinistral shear was also active across the area causing a swing in strike and a late set of minor cross faults.Structural facing directions in southwest Ireland appear to be directly linked with the geometry of the deformed basins. Hence the southward facing along the south coast is due to the proximity of the southern margin of the South Munster Basin. Structural facing directions fan northwards across the basin and major folds are overturned to the north at the northern margin of the basin.

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Facies relationships in the Upper Devonian‐Lower Carboniferous of southwest Ireland and adjacent regions

Cited by 19 publications

References 12 publications

The evolution of a thick shallow marine succession, the South Munster Basin, Ireland

The evolution of a thick shallow marine succession, the South Munster Basin, Ireland

The South Munster Basin of southwest Ireland

The stratigraphy and structure of the Galley Head culmination zone: An area of enhanced shortening related to basin geometry within the Irish Variscides

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