Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-29T17:08:21.587Z Has data issue: false hasContentIssue false
  • English
  • Français

A probable glacio-marine deposit of Late Ordovician—Early Silurian age from the north central Newfoundland Appalachian Belt

Published online by Cambridge University Press:  01 May 2009

A. M. McCann  and
M. J. Kennedy
A. M. McCann
Affiliation:
Department of Geology, University of Alberta, Edmonton, Alberta, Canada
M. J. Kennedy
Affiliation:
Department of Geology, Memorial University of Newfoundland, St John's, Newfoundland, Canada
Get access Rights & Permissions [Opens in a new window]

Summary

Conglomerate beds occur in an Upper Ordovician—Lower Silurian clastic sequence on the northeastern side of the Newfoundland Central Paleozoic Mobile Belt. They contain scattered pebbles and cobbles dispersed in a finely laminated sandstone and siltstone matrix. Laminations are generally 5–20 mm thick and the clasts 10–300 mm across. The laminations are locally disrupted by the clasts. These laminations have subsequently been tectonically flattened into augen around the clasts and locally disrupted by boudinage. It is concluded that these conglomerate beds represent icerafted glacio-marine deposits interbedded with turbidites which were probably deposited in a locally restricted marine environment. The deposits are interpreted on the basis of scattered fossil localities as being of Late Ordovician–Early Silurian age. They are compared with deposits of similar age elsewhere in the North Atlantic region.

Type
Articles
Information
Geological Magazine , Volume 111 , Issue 6 , November 1974 , pp. 549 - 564
Copyright
Copyright © Cambridge University Press 1974

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Aalto, K. R. 1971. Glacial marine sedimentation and stratigraphy of the Toby Conglomerate (Upper Proterozoic), Southeastern British Columbia, Northwestern Idaho and Northeastern Washington. Can. J. Earth Sci. 8, 753–87.CrossRefGoogle Scholar
Beuf, S., Biju-Duval, B., De Charpal, O., Rognon, P., Gariel, O. & Bennacef, A. 1971. Les Grès du Paléozoique inférieur au Sahara. Publications de l'Institut Francais du Pétrole; Collection Science et Technique du Pétrole 18. Ed.Techn., , Paris, xv, 464 pp.Google Scholar
Binda, P. L. & Van Eden, J. G. 1972. Sedimentological evidence on the origin of the Precambrian Great Conglomerate (Kundelungu Tillite), Zambia. Palaeogeog., Palaeoclimatol., Palaeoecol. 12, 151–68.CrossRefGoogle Scholar
Bradley, W. H. 1965. Vertical density currents. Science, N.Y. 150, 1423–8.Google Scholar
Bullard, E. C., Everett, J. R. & Smith, A. G. 1965. The fit of the continents around the Atlantic. In: A symposium on continental drift. Phil. Trans. R. Soc. Lond. 257, 41–51.Google Scholar
Burke, K. & Waterhouse, J. B. 1973. Saharan glaciation dated in North America. Nature, Phys. Sci. 241, 267–8.CrossRefGoogle Scholar
Creer, K. M. 1970. A review of palaeomagnetism. Earth Sci. Rev. 6, 369–466.CrossRefGoogle Scholar
Crowell, J. C. 1964. Climatic significance of sedimentary deposits containing dispersed megaclasts. In Nairn, A. E. M. (Ed.): Problems in Palaeoclimatology. Interscience, London. pp. 2887–912.Google Scholar
Crowell, J. C. & Frakes, L. A. 1972. Late Paleozoic glaciation. Part V. Karroo Basin, South Africa. Bull. geol. Soc. Am. 81, 2887–912.CrossRefGoogle Scholar
Dangeard, L. & Doré, F. 1971. Facies glaciaires de l'Ordovicien supérieur en Normandie. In Colloque—Silurien, Brest. Mem. Bur. Rech. Geol. et Min 73, 119–25.Google Scholar
Fairbridge, R. W. 1971. Reply to Upper Ordovician glaciation in Northwest Africa? Bull. geol. Soc. Am. 82, 269–74.Google Scholar
Flinn, D. 1962. On folding during three-dimensional progressive deformation. Q. Jl geol. Soc. Lond. 118, 385–433.CrossRefGoogle Scholar
Flint, R. F., Sanders, J. E. & Rodgers, J. 1960. Diamictite: a substitute term for symmictite. Bull. geol. Soc. Am. 71, 1809–10.CrossRefGoogle Scholar
Harland, W. B. 1972. The Ordovician Ice Age — Essay Review. Geol. Mag. 109, 451–6.CrossRefGoogle Scholar
Harland, W. B., Herod, K. N. & Krinsley, D. H. 1966. The definition and identification of tills and tillites. Earth Sci. Rev. 2, 225–56.Google Scholar
Heezen, B. C. & Hollister, C. 1964. Turbidity currents and glaciation. In Nairn, A. E. M. (Ed.): Problems in Palaeoclimatology. Interscience, London. 99–107, 111–12.Google Scholar
Helwig, J. & Sarpi, E. 1969. Plutonic-Pebble Conglomerates, New World Island, Newfoundland, and history of Eugeosynclines. In Kay, M. (Ed.): North Atlantic — Geology and continental drift. Mem. Am. Ass. Petrol. Geol. 12, 443–66.Google Scholar
Hicken, A., Irving, E., Law, L. K. & Hastie, J. 1972. Catalogue of palaeomagnetic directions and poles. Publs of Earth Physics Branch, Dept. Energy, Mines and Resources, Ottawa: vol. 45, no. 1.CrossRefGoogle Scholar
Horne, G. S. 1969. Early Ordovician chaotic deposits in the central volcanic belt of northeastern Newfoundland. Bull. geol. Soc. Am. 80, 2451–64.Google Scholar
Kay, M. 1969. Silurian of Northeast Newfoundland Coast. In Kay, M. (Ed.): North Atlantic — Geology and continental drift. Mem. Am. Ass. Petrol. Geol. 12, 415–24.Google Scholar
Kay, M. 1970. Flysch and bouldery mudstone in N. E. Newfoundland. In Lajoie, J. (Ed.): Flysch Sedimentology in North America. Geol. Ass. Can. Spec. Pap. 7, 155–64.Google Scholar
Kennedy, M. J. & McGonigal, M. H. 1972. The Gander Lake and Davidsville Groups of Northeastern Newfoundland: New data and Geotectonic Implications. Can. J. Earth Sci. 9, 452–9.CrossRefGoogle Scholar
Kuenen, P. H. 1951. Mechanism of varve formation and the action of turbidity currents. Geol. För. Stockh. Förh. 73, 69–84.CrossRefGoogle Scholar
McElhinny, M. W. & Briden, J. C. 1971. Continental drift during the Palaeozoic. Earth Planet. Sci. Lett. 10, 407–16.CrossRefGoogle Scholar
McElhinny, M. W., Briden, J. C., Jones, D. L. & Brock, A. 1968. Geological and geophysical implications of palaeomagnetic results from Africa. Rev. Geophys. 6, 201–38.Google Scholar
McElhinny, M. W. & Luck, G. R. 1970. Palaeomagnetism and Gondwanaland. Science, N.Y. 168, 830–2.Google Scholar
Ovenshine, A. T. 1970. Observations of iceberg rafting in Glacier Bay, Alaska, and the identification of ancient ice-rafted deposits. Bull. geol. Soc. Am. 81, 891–4.Google Scholar
Reid, P. C. & Tucker, M. E. 1972. Probable Late Ordovician glacial marine sediments from Northern Sierra Leone. Nature, Phys. Sci. 238, 38–40.CrossRefGoogle Scholar
Schenk, P. E. 1972. Possible Late Ordovician glaciation in Nova Scotia. Can. J. Earth Sci. 9, 95–107.CrossRefGoogle Scholar
Spjeldnaes, N. 1965. The Eocambrian glaciation in Norway. Geol. Rdsch. 54, 24–45.CrossRefGoogle Scholar
Sutton, J. & Watson, J. 1954. Ice-borne boulders in the Macduff Group of the Dalradian of Banffshire. Geol. Mag. 91, 391–8.Google Scholar
Temain, G. 1971. L'Ordovicien Est-Marianique (Espagne), sa place dans la Province Mediterranéene. In Colloque Ordovicien—Silurien, Brest. Mem. Bur. Rech. Geol. Min. 73, 403–16.Google Scholar
Tucker, M. E. & Reid, P. C. 1973. The sedimentology and context of Late Ordovician glacial marine deposits from Sierra Leone, West Africa. Palaeogeog., Palaeoclimatol., Palaeoecol. 13, 289–307.CrossRefGoogle Scholar
Twenhofel, W. H. 1947. The Silurian of Eastern Newfoundland with some data relating to physiography and Wisconsin Glaciation of Newfoundland. Am. J. Sci. 245, 65–122.Google Scholar
Williams, H. 1964(a). The Appalachians in Northeastern Newfoundland — A two-sided symmetrical system. Am. J. Sci. 262, 1137–58.Google Scholar
Williams, H. 1964(b). Botwood, Newfoundland. Geol. Surv. Canada, Map. 60–1963.Google Scholar
Williams, H. 1967. Silurian rocks of Newfoundland. In Neale, E. R. W. & Williams, H. (Eds): Geology of the Atlantic Region. Geol. Ass. Can. Spec. Pap. 4, 93–137.Google Scholar
Williams, H., Kennedy, M. J. & Neale, E. R. W. 1972. The Appalachian Structural Province. In Price, R. A. & Douglas, R. J. W. (Eds): Variations in Tectonic Styles in Canada. Geol. Ass. Can. Spec. Pap. 11, 182–261.Google Scholar