Geologic Comparison of Western Ireland and Northeastern Newfoundland

Phillips, W. E. A.; Kennedy, Michael J.; Dunlop, Gair

doi:10.1306/m12367c15

Cited by 9 publications

(3 citation statements)

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“…The continental offset between these two models is about 560 km, and for the purposes of this paper cannot be considered to be significant. (1965,1966), Phillips, Kennedy & Dunlop (1969), Belt (1969), Church (19691, Kay (1969b, and many others have noted the similarities between the geology of North America and that of Europe. As Kay (1969b : 967) remarks: "the similarities in the stratigraphic-structural belts of Newfoundland and the British lsles are so great that the probability of their being accidental is trivial".…”

Section: Figmentioning

confidence: 96%

Continental drift, paleoclimatology, and the evolution and biogeography of birds

Cracraft

1973

Journal of Zoology

175

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An analysis is presented of the influence that late Mesozoic and Tertiary paleogeography and paleoclimatology may have had on the evolution and biogeography of birds. Many intercontinental connections, especially in the Southern Hemisphere, persisted until the late Cretaceous and/or early Tertiary. Moreover, climates at these times were warmer and more equable than in the late Tertiary, and birds could breed in and disperse through high latitudes. It is concluded that a number of avian orders and families had their origin in Gondwanaland and predrift configurations of the continents were major determinants of their biogeography. Penguins, ratites, galliforms, and suboscines among others are the best examples. Tropical‐subtropical Eurasia was probably the centre of origin for the oscines, and primitive stocks entered the New World mostly through Beringia and mostly prior to the Miocene (but also via a North Atlantic land connection prior to the early Eocene). Continental drift and paleoclimatology have clearly influenced the evolution and biogeography of birds, and future advances in the systematics of the higher taxa will undoubtedly provide further confirmation of this.

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Section: Figmentioning

confidence: 96%

Continental drift, paleoclimatology, and the evolution and biogeography of birds

Cracraft

1973

Journal of Zoology

175

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“…Some workers have suggested that there may be more than one phase of dolerite intrusion in North Donegal (Pitcher and Berger 1972, p. 48;Obaid 1971Obaid , 1977a, as has been proposed in western Ireland (Edmonds and Thomas 1966;Cruse and Leake 1968;Taylor 1968;Phillips et al 1969) and Scotland (Rast 1958;Sturt and Harris 1961).…”

Section: Introductionmentioning

confidence: 92%

Petrology, structure and age of the Rough Point sill, Donegal

Elsdon

1986

Geological Journal

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The Rough Point sill, which is one of the thickest of a large number of sills intruded into the Appin Group metasediments of the Dalradian sequence in north Donegal, contains a number of internal features including mafic: felsic banding, pegmatite bands and significant variations in grain size. There are also appreciable variations in mineralogy, particularly the proportions of plagioclase and amphibole, and in the major and trace element chemistry. Together these features indicate that the sill is, like the metasediments which it intrudes, inverted, and is therefore older than the Caledonian F, structures which caused the inversion. Disruption of the sediments at the sill contact is also earlier than the F, event. The timing of the basic magmatic episode together with the geochemistry of the sill invite comparison with the metadolerites of the southwest Highlands of Scotland.

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“…This suggestion is based partly on the presence of Old Red Sandstone rocks, partly on the distribution of the Lower Palaeozoic and Dalradian rocks and partly on the alignment of the fault. However, the presence of such a major single lineament has also been questioned (Phillips et al 1969;Graham 1981a). The dating of these successions is clearly very important in assessment of the relationships with Scotland.…”

mentioning

confidence: 99%

Age and significance of the Old Red Sandstone around Clew Bay, NW Ireland

Graham

Richardson

Clayton

1983

Transactions of the Royal Society of Edinburgh: Earth Sciences

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The stratigraphy of red bed successions in the Clew Bay area of County Mayo (Ireland) is described, and new palynological evidence for the age of some of the rocks is presented. The Old Red Sandstone in the Clew Bay area comprises several lithostratigraphic units. The Louisburgh succession is interpreted as part of a Silurian marginal marine sequence. Devonian strata are represented by the Islandeady Group which has yielded plant spores which suggest that these rocks should be assigned to the Lower Devonian (Siegenian to Emsian) and the Beltra Group which contains Middle Devonian (Eifelian) spores. These Lower and Middle Devonian strata are probably separated by an unconformity, and are overlain with clear unconformity by the highest unit, the Maam Formation, which is Dinantian (Carboniferous) in age. The Clew Bay Old Red Sandstone succession, therefore, shows important differences from that of the Midland Valley of Scotland, with which it has previously been compared.

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Geologic Comparison of Western Ireland and Northeastern Newfoundland

Cited by 9 publications

References 0 publications

Continental drift, paleoclimatology, and the evolution and biogeography of birds

Continental drift, paleoclimatology, and the evolution and biogeography of birds

Petrology, structure and age of the Rough Point sill, Donegal

Age and significance of the Old Red Sandstone around Clew Bay, NW Ireland

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