The Glen Falls Formation-An Example of Barrier Island Retreated by Shorface Erosion
Abstract
The Glen Falls Formation constitutes part of the Cambrian-Early Ordovician Saint John Group which is exposed in southern New Brunswick, Canada. Six facies, i.e. laminated quartzite, channelized quartzite, pebbly quartzite and conglomerate, massively bedded quartzite, trough moss-stratified quartzite, and black sandstone facies, are recognized within the formation. These facies were deposited in varied environments within a barrier island and include storm washover deposits through dune, backshore to shoreface deposits. Most of the facies are laterally restricted and there is an uneven distribution of both the facies and the formation as la whole. Detailed analysis of strata of the Glen Falls Formation suggest that they represent the remnants of a barrier island which was retreated by shoreface erosion.
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