Lithofacies analysis of the Catfish Creek till: Bradtville, Ontario

Authors

  • David H. Huntley Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3, Canada

DOI:

https://doi.org/10.4138/1737

Abstract

Sedimentologic and facies analyses are used to interpret a section of Catfish Creek till at Bradtville, Ontario. Repetitive passive lodgement of debris-rich ice and gradual melt-out beneath active ice produced four massive matrix-supported diamicts (Dmm) separated by sand (Sg) and gravel (Gm) horizons. This sequence was partly reworked by melt-water focused along sand horizons, depositing cross-cutting Dcm, Sg and Gm facies. Post-depositional faulting also occurred. Deposition and glaciofluvial reworking are inferred to have occurred at some distance behind an alternately floated and grounded margin of the late Wisconsinan Erie Lobe. RÉSUMÉ Une approche sédimentologique et une analyse des faciès sont utilisées pour interpréter une coupe du till du ruisseau Catfish à Bradville, en Ontario. La succession de la mise en place passive de glace riche en débris et de la fonte graduelle sous le glacier ont produit quatre diamictons à support par la matrice (Dmm), séparés par des horizons de sable (Sg) et de gravier (Gm). Cette séquence a été en partie remaniée par de l'eau de fonte concentrée le long d'horizons sableux, qui à dépose les faciès discordants Dcm, Sg et Gm. Des mouvements de failles postérieurs au dépôt se sont aussi produits. Il est déduit que le dépôt et le remaniement fluvio-glaciaire se seraient produits à une certaine distance de la marge du lobe Erié, du Wisconsinien tardif, laquelle était altérnativement flottante et échouée. [Traduit par le journal]

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Published

1991-11-01

How to Cite

Huntley, D. H. (1991). Lithofacies analysis of the Catfish Creek till: Bradtville, Ontario. Atlantic Geoscience, 27(3). https://doi.org/10.4138/1737

Issue

Vol. 27 No. 3 (1991)

Section

Articles

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