Skip to main content Accessibility help
×
Home

Till Texture in Drumlins

  • P. F. Karrow (a1)

Abstract

Drumlin till has often been described as clay-rich. Drumlins in Ontario are composed of sandy till. Additional examples from north-eastern North America show that sandy till is common in drumlins.

It is suggested that the widely accepted association between drumlins and clay till was fostered by the use of such terms as “boulder clay” and “glacial clay”. Also, because till in drumlins may be finer than other glacial materials in such areas as the Appalachian region, a loose and exaggerated description of such material as being clay-rich arose. More careful description of drumlin till is advocated. It is suggested that grain-size distribution of till may have had a role in drumlin formation.

Résumé

On a souvent décrit les dépôts dans les drumlins comme riches en argile. Les drumlins dans l’Ontario sont composés de dépôts sablonneux. Des exemples supplémentaires provenant du Nord-Est de l’Amérique du Nord montrent que ces dépôts sablonneux sont communs dans les drumlins.

On pense que l’association communément admise entre les drumlins et les dépôts argileux a été entretenue par l’utilisation d’expressions comme “argiles à blocaux” et “argiles glaciaires”. Aussi, parce que les dépôts dans les drumlins peuvent être plus fins que d’autres matériaux glaciaires dans des régions comme les Appalaches, est née une description fautive et exagérée de ces matériaux comme étant riches en argile. On plaide pour une description plus soigneuse des dépôts des drumlins. On suggère que la distribution des tailles des grains dans les dépôts peut avoir joué un rôle dans la formation des drumlins.

Zusammenfassung

Drumlinschutt wurde oft als tonreich beschrieben. Drumlins in Ontario bestehen aus sandigem Schutt. Weitere Beispiele aus dem Nordosten Nordamerikas zeigen, dass sandiger Schutt in Drumlins sehr häufig auftritt.

Es wird vermutet, dass die oft angenommene Zusammengehörigkeit von Drumlins und Tonschutt durch den Gebrauch von Ausdrücken wie “Geschiebemergel” und “glazialer Ton” gefördert wurde. Des weiteren ergab sich eine ungenaue und übertriebene Beschreibung des Drumlinschttes als tonreich, weil der Schutt von Drumlins in Gebieten wie den Appalachen feiner sein kann als anderes glaziales Material. Es wird deshalb eine sorgfältige Beschreibung des Drumlinschuttes angeregt. Bei der Drumlinbildung könnte die Verteilung der Korngrössen im Schutt eine Rolle gespielt haben.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Till Texture in Drumlins
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Till Texture in Drumlins
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Till Texture in Drumlins
      Available formats
      ×

Copyright

References

Hide All
Bloom, A. L. [c 1978.] Geomorphology: a systematic analysis of late Cenozoic landforms. Englcwood Cliffs, N.J., Prentice-Hall.
Chapman, L. J., and Putnam, D. F. 1951. The physiography of southern Ontario. Toronto, University of Toronto Press for Ontario Research Foundation.
Charlesworth, J. K. 1957. The Quaternary era, with special reference to its glaciation. London, Edward Arnold, 2 vols.
Cowan, W. R. 1975. Quaternary geology of the Woodstock area. Ontario. Division of Mines. Geological Report 119.
Cowan, W. R. 1979. Quaternary geology of the Palmerston area. Ontario. Geological Survey. Report 187.
Crosby, W. O. 1892. Composition of the till or bowlder-clay [sic]. Proceedings of the Boston Society of Natural History, Vol. 25, p. 11540.
Embleton, C., and King, C. A. M. 1968, Glacial and periglacial geomorphology. London, Edward Arnold.
Flint, R. F. [c 1947.] Glacial geology and the Pleistocene epoch. New York, John Wiley and Sons.
Flint, R. F. [c 1957.] Glacial and Pleistocene geology. New York, John Wiley and Sons.
Flint, R. F. [c 1971] Glacial and Quaternary geology. New York, John Wiley and Sons.
Goldthwait, J. W. 1924. Physiography of Nova Scotia. Canada. Geological Survey. Memoir 140.
Gravenor, C. P. 1953. The origin of drumlins. American Journal of Science, Vol. 251, No. 9, p. 674–81.
Gravenor, C. P. 1974. The Yarmouth drumlin field, Nova Scotia, Canada. Journal of Glaciology, Vol. 13, No. 67, P 4554.
Karrow, P. F. 1963. Pleisiocene geology of the Hamilton–Gait area. Ontario. Dept. of Mines. Geological Report 16.
Karrow, P. F. 1967. Pleistocene geology of the Scarborough area. Ontario. Dept. of Mines. Geological Report 46.
Karrow, P. F. 1968. Pleistocene geology of the Guelph area. Ontario. Dept. of Mines. Geological Report 61.
Karrow, P. F. 1970. Pleistocene geology of the Thorn bill area. Ontario. Dept. of Mines. Industrial Mineral Report 32.
Karrow, P. F. 1974. Till stratigraphy in parts of southwestern Ontario. Geological Society of America. Bulletin, Vol. 85, No. 5, p, 761–68.
Karrow, P. F. [c 1976.] The texture, mineralogy, and petrography of North American tills. (In Legget, R. F., ed. Glacial till. An interdisciplinary study. [Ottawa], Royal Society of Canada in co-operation with the National Research Council of Canada, p. 8398. (Royal Society of Canada Special Publications, No. 12.))
Lasca, N. P. 1970. The drumlin field of southeastern Wisconsin, Wisconsin. Geological and Natural History Survey. Information Circular No, 15, p, E–1E–13.
MacNeil, R. H. 1965. Variation in content of some drumlins and tills in southwestern Nova Scotia. Maritime Sediments, Vol. I, No. 3, p. 1619.
Menzies, J. 1979[a]. The mechanics of drumlin formation with particular reference to the change in pore-water content of the till. Journal of Glaciology, Vol. 22, No. 87, p. 37384.
Menzies, J. 1979[b]. A review of the literature on the formation and location of drumlins. Earth-Science Reviews, Vol. 14, No. 4, p. 31559.
Muller, E. H. 1963. Geology of Chautauqua County, New York. Part II. Pleistocene geology. Bulletin of the New York State Museum and Science Service, No. 392.
Scott, J. S. [c 1976.] Geology of Canadian tills. (In Legget, R. F., ed. Glacial till. An interdisciplinary study. [Ottawa], Royal Society of Canada in co-operation with the National Research Council of Canada, p. 5066. (Royal Society of Canada Special Publications, No. 12.))
Sharpe, D. R. 1979. Quaternary geology of the Merrickville area. Ontario. Geological Survey. Report 180.
Smalley, I. J., and Unwin, D. J. 1968. The formation and shape of drumlins and their distribution and orientation in drumlin fields. Journal of Glaciology, Vol. 7, No. 51, p. 37790.
Watt, A. K. 1957. Pleistocene geology and ground-water resources of the township of North York, York County. Ontario. Dept. of Mines. Annual Report, Vol. 64, Pt. 7, 1955.
White, O. L. 1975. Quaternary geology of the Bolton area. Ontario. Division of Mines. Geological Report 117.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed