A mid-Frasnian marine incursion into the southern part of the Munster Basin: evidence from the Foilcoagh Bay Beds, Sherkin Formation, SW County Cork, Ireland

Higgs, Kenneth T.; MacCarthy, I. A. J.; O'Brien, Mike

doi:10.1144/gsl.sp.2000.180.01.15

Cited by 7 publications

(17 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The destination of these major rivers is unconstrained. Early Pragian and late Pragian-early Emsian microfloras (Higgs 1999), within the ?middle Lower ORS of the basin, date the switch to axial dispersal in the basin (Coumeenoule Formation) to approximately mid-Pragian time.…”

Section: South Devon-trevonementioning

confidence: 99%

Kinematics and dynamics of Old Red Sandstone basins

Friend

Williams

Ford

et al. 2000

View full text Add to dashboard Cite

The Old Red Sandstone basins of the North Atlantic borderlands provide a record of diverse dynamics in very different settings, related to the Variscan, Caledonian and Ellesmerian orogenies. This paper is a first attempt to review much new information on the basins, including information presented, for the first time, in this book. Five basin groupings are distinguished: (1) Scandinavian basins of, syn-to post-Scandian (Caledonian) age, formed on greatly thickened crust by extension or transtension (Western Norway, East Greenland, Spitsbergen); (2) NE Scotland, Orcadian Basin, mid Caledonian setting, formed by extension;(3) Scotland (Midland Valley) and related Irish basins, north of the Caledonian Iapetus Suture Zone, formed by extension; (4) southern Britain and Ireland, basins south of the Iapetus Suture Zone, related to collision of Eastern Avalonia with Laurentia, and Maritime Canada and the Catskills related to collision of Western Avalonia; these are load-induced flexural basins; (5) Southern margin of Eastern Avalonia, (Munster, South Wales, SW England), of Late Devonian age, extensional basins of various (Early to Late) Devonian ages.The Old Red Sandstone (ORS) of the lands bordering the North Atlantic Ocean ranges in age from mid-Silurian to Carboniferous time. It provides the fill of many basins, which range in location from the Appalachians at 40~ to Spitsbergen, at 80 ~ N, a distance of some 4500 km.The Old Red Sandstone has long been seen as a stratigraphic response to major Palaeozoic (Caledonian) mountain-building, and particularly as a late-or post-orogenic (molasse) magnafacies. However, the basin-forming mechanisms have not been reviewed recently enough to reflect new research into geodynamics. There is now much greater knowledge of the basins involved, and much new work has been performed on the orogens. One object of this paper is to provide a modern overview of the basins in general tectono-stratigraphic terms. The second object is to discuss the extent to which current ideas on basin geodynamics can be applied to the ORS of the North Atlantic region. In this, we attempt to specify (1) ORS basin kinematics, based on a review of published information on mainly fault and related fold structures that have been traditionally used to characterize kinematics, and (2) ORS basin dynamics, from available geohistory (subsidence) analyses and tectono-stratigraphic context of individual basins. Finally, in the discussion section, we attempt a synthesis of ORS basin geodynamics in relation to plate-scale and body forces related to the temporally and spatially overlapping Caledonian, Variscan and Ellesmerian Orogenies. First, we briefly review the principal basinforming mechanisms.

show abstract

Section: South Devon-trevonementioning

confidence: 99%

Kinematics and dynamics of Old Red Sandstone basins

Friend

Williams

Ford

et al. 2000

View full text Add to dashboard Cite

show abstract

“…The ORS basin-fill sequence of the IveraghDerrynasaggarts region passes conformably upwards to Lower Carboniferous marine strata in the Sneem (Capewell 1957;Higgs & Russell 1981), Kenmare (Husain 1957) and Killarney (Walsh 1968;Higgs et al 1988) areas (Fig. 2).…”

Section: Geological Settingmentioning

confidence: 90%

“…The horizon of the Moll's Gap Quarry microflora (Higgs & Russell 1981) outcrops in the hinge zone of the Mangerton Anticline [V85937755] 14.25 km to the WSW, along the axial surface trace of the fold from the sample site in the Horses Glen Volcanic Centre (Fig. 2).…”

Section: Moll's Gap Quarrymentioning

confidence: 99%

“…First, the vertebrate Bothriolepis, from the west Iveragh succession, has been considered to place a maximum age of late Givetian-early Frasnian on its enclosing sediments (Russell 1978). Second, a miospore assemblage from a section in SE Iveragh (Moll's Gap Quarry) has been assigned slightly conficting late Givetian-early Frasnian (van Veen & van der Zwan 1980) and early Frasnian (Higgs & Russell 1981) ages. Limitations, however, apply to these records.…”

mentioning

confidence: 99%

See 1 more Smart Citation

U-Pb zircon geochronology of silicic tuffs and chronostratigraphy of the earliest Old Red Sandstone in the Munster Basin, SW Ireland

Williams

Сергеев

Stössel

et al. 2000

Self Cite

View full text Add to dashboard Cite

Newly acquired U-Pb magmatic zircon dates from silicic tufts within the Old Red Sandstone (ORS) magnafacies of the Munster Basin (SW Ireland) are intercalibrated with newly discovered (late Givetian) and reappraised (mid-Frasnian) miospore assemblages to provide the first biostratigraphically constrained numerical ages in the Irish Devonian succession. The weighted mean 2~176 isotopic age determined for the Keel Tuff Bed (385.0 + 2.9 Ma) is indistinguishable from that of the previously investigated Enagh Tuff Bed (384.9 + 0.7 Ma). In conjunction with very similar rare earth element (REE) signatures, this confirms their correlation, placing a minimum age of 384.9 + 0.4 Ma on the newly discovered Reenagaveen microflora, which is assigned to the late Givetian TCo Oppel zone. The equivalence of the Keel and Enagh Tufts constrains a vertebrate fauna containing Bothriolepis and the Valentia Island tetrapod ichnofauna to pre-date this event. Isotopic dating of thickly bedded subaerial tufts from the Lough Guitane Volcanic Complex, a major accumulation of rhyolites and silicic volcaniclastic rocks, reveals ages of 384.5 +_ 1.0 Ma (Killeen Volcanic Centre), indistinguishable from the Keel-Enagh Tuff Bed, and 378.5-t-0.2 Ma from the Horses Glen Volcanic Centre, previously considered to be the oldest of the complex. The Horses Glen Centre post-dates the Moll's Gap Quarry microflora, the only current biostratigraphical control on the age of the early ORS in the east of the basin depocentre, thus indicating a minimum age for the (mid-Frasnian) IV Oppel zone, the revised biostratigraphic age of this assemblage. These controls on the early ORS (1) suggest that Munster Basin initiation occurred before late Givetian time and (2) give time-averaged (compacted) accumulation rates of c. 0.17-0.25 and 0.18 mm a -1 for eastern and western Iveragh, respectively. The minimum basin duration time was c. 23 Ma to the end of the Devonian period. The implications of these data for the depocentre stratigraphy, volcanic events, proposed ORS cyclicities and the geohistory of the Munster Basin are examined.

show abstract

“…More detailed spore analysis in different sections may greatly improve the precision of age determinations if specific transgressive phases can be correlated. For example, the midFrasnian marine event recently identified by Higgs et al (2000) in the Munster Basin, Ireland, could approximate to marine horizons in the Escuminac sequence of Canada, noted for its famous Devonian fish fauna , but which has also produced acritarchs at some horizons . Similar comparisons might apply to the acritarch and fish horizons in the Venezuelan sequence.…”

Section: Depositional Environmentmentioning

confidence: 99%

A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America

Young

Moody

2008

Fossil Record

View full text Add to dashboard Cite

A new Devonian fossil fish fauna from the region of Caiio Colorado between the Rio Palmar and Rio Socuy, Sierra de Perijh, Venezuela, comes from two localities and several horizons within the Campo Chico Formation, dated on plants and spores as Givetian-Frasnian in age. Placoderms are most common, with the antiarch Bothriolepis perija n. sp., showing affinity with species from the Aztec fish fauna of Victoria Land, Antarctica. A second antiarch, Venezuelepis mingui n.g. nsp., is also closely related to an Antarctic species, which is reassigned to this new genus. Fragmentary remains of a phyllolepid placoderm show similarity to the genus Austrophyllolepis from southeastern Australia. Chondrichthyan spines are provisionally referred to the Antarctilamnidae, and acanthodian remains include spines of the widespread taxon Muchueracunthus. Osteichthyans are represented by osteolepid and dipnoan scales and teeth, and scales lacking cosmine which may belong to another major taxon. This fauna has provided the first Devonian record from South America of three major fish groups: antiarch and phyllolepid placoderms, and dipnoans. These are widely distributed on most other continents. Although invertebrates and plants from the same sequence closely resemble those of eastern North America, the endemic elements in the fish fauna indicate Gondwana affinities. Phyllolepid placoderms are common in Givetian-Frasnian strata of Australia and Antarctica, but are only known from the Famennian in the Northern Hemisphere. The new phyllolepid occurrence extends their range across the northern margin of Palaeozoic Gondwana. The age and affinities of this new fish fauna are consistent with a model of biotic dispersal between Gondwana and Euramerica at or near the Frasnian-Famennian boundary. A narrow marine barrier separating northern and southern continental landmasses is indicated, in contrast to the wide equatorial ocean for the Late Devonian postulated from palaeomagnetic data.Key words: Fishes, Placodermi, Chondrichthyes, Osteichthyes, Acanthodii, Devonian, Venezuela. ZusammenfassungEs wird eine neue devonische Fischfauna aus dem Gebiet zwischen Caiio Colorado und Rio Socuy, Sierra de Perija, beschrieben. Die Funde stammen aus zwei Lokalitaten und mehreren Horizonten innerhalb der Campo Chico Formation, die auf Grundlage von Untersuchungen der Pflanzen-und Sporenfunde dem Zeitabschnitt Givetium-Frasnium zugeordnet werden. Placodermen sind durch den Antiarchen Bothriolepis periju n. sp. haufig vertreten. Sie sind mit Arten der Aztec-Fischfauna von Viktoria Land, Antarktis, verwandt. Ein zweiter Antiarche, der Venezuelepis ningui n. g. n. sp. ist eng mit einer Spezies aus der Antarktis verwandt, die ebenfalls dieser neuen Gattung zugeschrieben wird. Fragmentarische Reste eines phyllolepiden Placodermen weisen Ahnlichkeiten mit der Gattung Austrophyllolepis aus dem Siidosten Australiens auf. Wirbel eines Chondrichthyer werden vorlaufig den Antarctilamnidae zugeschrieben. Acanthodir-Reste schlieBen das weitverbreitete Taxon Muchae...

show abstract

A mid-Frasnian marine incursion into the southern part of the Munster Basin: evidence from the Foilcoagh Bay Beds, Sherkin Formation, SW County Cork, Ireland

Cited by 7 publications

References 27 publications

Kinematics and dynamics of Old Red Sandstone basins

Kinematics and dynamics of Old Red Sandstone basins

U-Pb zircon geochronology of silicic tuffs and chronostratigraphy of the earliest Old Red Sandstone in the Munster Basin, SW Ireland

A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America

Contact Info

Product

Resources

About