Abstracts
Abstract
Internal parting surfaces associated with fluidization tones up to 20b in length, occurring In the alluvial redbeds of Prince Edward Island contain secondary sedimentary structures resembling sole marks. These are described and their origin considered in terms of physical diagenesis.
Rapidly escaping pore water in conjunction with load deformation within fluidized zones during dewatering and compaction of the redbeds are thought to have been the principal processes involved in the formation of these structures.
RESUME
On rencontre dans lea lits rouges alluviaux de l'lle du Prince-Edouard des plans internes d« rupture qui sont associSs i des zones de fluidite mesurant jusqu'a 20mde long et qui font voir sur leur substratum, des empreintes ressemblant ades structures sSdimentaires secondaires. Ces structures sont decrites et on envisage une origine due a la diagenese physique.
L'gjection rapide des eaux interstitlelles accompagnte d'une deformation de charge au seln deszones de fluiditS pendant la d£shydratation et le tassement des lits rouges expliqueraient engrande partie la formation de ces structures. [Traduit par le journal]
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