. The Canadian field-naturalist. 120 The Canadian Field-Naturalist [Vol. XLII horst where the waves are quarrying the oolitic rock into large boulders and depositing them on the edge of the submarine escarpment of the San- taren Channel, we were able to study the origin of pene-contemporaneous conglomerates, or those in which the phenoclasts are being derived from lithified sediments of relatively the same age as the enclosing matrix. These blocks must eventu- ally find a resting place in from 100 to 600 fathoms, if some of them have not already done so. Per- haps at times they literally plung
. The Canadian field-naturalist. 120 The Canadian Field-Naturalist [Vol. XLII horst where the waves are quarrying the oolitic rock into large boulders and depositing them on the edge of the submarine escarpment of the San- taren Channel, we were able to study the origin of pene-contemporaneous conglomerates, or those in which the phenoclasts are being derived from lithified sediments of relatively the same age as the enclosing matrix. These blocks must eventu- ally find a resting place in from 100 to 600 fathoms, if some of them have not already done so. Per- haps at times they literally plunge into the finer grained calcareous bottom deposits which must contain organisms of relatively the same age as those included in the blocks. Were the Missis- sippi delta to extend further to the southeast so as to mantle the lower slopes of the Bahama submarine slope or escarpment, we should have pene-contemporaneous conglomerate all the ele- ments of which had been derived from the same direction. While this suggestion may appear over fanciful to some, at least it is founded upon a modicum of active phenomena and is not there- fore quite so theoretical as some of our recent ideas regarding the origin of Paleozoic pene-contem- poraneous conglomerates. This question imme- diately arises: Is our present conception regarding the origin and form of the entirb Appalachian Geosyncline of deposition correct, or must we modify it in the light of what we see going on in the West Indies at the present time? It is quite probable that the West Indian conditions are unusual, but so are the Levis conglomerates. I feel that the reason why the stratigrapher has made so little progress in the study of the sedi-. COLLECTING SAMPLES OF MARINE SEDIMENTS. forming at the present time a pene-contempor- aneous deposit very similar to that of the Levis formation at Quebec. In fact, the same type of pene-contemporaneous conglomerate could be formed without postulating the derivation of a deep water shal
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