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A New Interpretation of the Llandovery Sequence of North Connemara, Eire

Published online by Cambridge University Press:  01 May 2009

David J. W. Piper
David J. W. Piper
Affiliation:
Sedgwick Museum, Cambridge.
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Abstract

The historical development of the stratigraphic nomenclature of the Llandovery of north Connemara is described. The lowest beds are red sandstones and interbedding keratophyre passing up into a complex sequence of grey, green and red clastics with shelly facies fossils. Above this are red and green mudstones and siltstones with rare graptolites. In the east these are overlain by coarse sandstones and conglomerates. The conglomerates are probably allochthonous. In the west this coarse facies is developed earlier and laterally interfingers with the shelly facies clastics and overlying mudstones. The sub-Wenlock unconformity reported by McKerrow and Campbell from this region is reinterpreted as an appearance of this interfingering.

Type
Articles
Information
Geological Magazine , Volume 104 , Issue 3 , June 1967 , pp. 253 - 267
Copyright
Copyright © Cambridge University Press 1967

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References

REFERENCES

Carruthers, R. G., and Muff, H. B., 1909. The Lower Palaeozoic rocks around Killary Harbour. Ir. Nat., 18, 7–11.Google Scholar
Gardiner, C. I., and Reynolds, S. H., 1912. The Ordovician and Silurian rocks of the Kilbride Peninsula (Mayo). Q. Jl geol. Soc. Lond., 68, 75–102.CrossRefGoogle Scholar
Gardiner, C. I., and Reynolds, S. H., 1914. The Ordovician and Silurian rocks of the Lough Nafooey area (County Galway). Q. Jl geol. Soc. Lond., 70, 104–118.CrossRefGoogle Scholar
Griffith, Sir R., 1838. Outline of the geology of Ireland. Second Report of the Railway Commissioners.Google Scholar
Harkness, R., 1866. On the metamorphic and fossiliferous rocks of the County of Galway. Q. Jl geol. Soc. Lond., 22, 506–513.Google Scholar
Kelly, J., 1860. On the greywacke rocks of Ireland. J. geol. Soc. Dubl., 8, 251–333.Google Scholar
Kilroe, J. R., 1907. The Silurian and metamorphic rocks of Mayo and North Galway. Proc. R. Ir. Acad., 26, B, 129–160.Google Scholar
Kilroe, J. R., and McHenry, A., 1901. The relation of the Silurian rocks of Ireland to the Great Metamorphic Series. Rep. Br. Ass. Advmt. Sci., (1901), 636–7.Google Scholar
Kinahan, G. H., 1874. Geology of west Galway and S.W. Mayo, Ireland. Geol. Mag., (NS), 1, 453–462.CrossRefGoogle Scholar
Kinahan, G. H., 1878. Manual of the Geology of Ireland. London. 444 pp.Google Scholar
Kinahan, G. H., and Nolan, J., 1870. Explanation to accompany sheet 95 of the map of the Geological Survey of Ireland. 71 pp.Google Scholar
Kinahan, G. H., Symes, R. G., Wilkinson, S. B., Nolan, J., Leonard, H. and Bailey, W. H., 1876. Explanatory memoir to accompany sheets 73 and 74 (in part) 83 and 84 of the maps of the Geological Survey of Ireland. 84 pp.Google Scholar
Kinahan, G. H., Nolan, J., Leonard, H. and Cruise, R. J., 1878. Explanatory memoir to accompany sheets 93 and 94…of the maps of the Geological Survey of Ireland. 177 pp.Google Scholar
McBride, E. F., 1962. Flysch and associated beds of the Martinsburg Formation (Ordovician), Central Appalachians. J. sedim. Petrol., 32, 39–91.Google Scholar
McKerrow, W. S., and Campbell, C. J., 1959. The Lower Palaeozoic rocks of North-West Galway. Proc. geol. Soc., 1565, 19–25.Google Scholar
McKerrow, W. S., and Campbell, C. J., 1960. The stratigraphy and structure of the Lower Palaeozoic rocks of North-West Galway. Scient. Proc. R. Dubl. Soc., A, 1, 27–52.Google Scholar
Murchison, Sir R. I., 1854. Siluria. London. 523 pp.Google Scholar
Powers, M. C., 1953. A new roundness scale for sedimentary particles. J. sedim. Petrol., 23, 117–9.CrossRefGoogle Scholar
Unrug, R. 1963. Istebna Beds—a fluxoturbidity formation in the Carpathian flysch. Roczn. pol. Tow. geol., 33, 49–92.Google Scholar
Ziegler, A. M., 1965. Silurian marine communities and their environmental significance. Nature, Lond., 207, 270–2.CrossRefGoogle Scholar