. Bulletin of the Geological Society of America. Geology. 360 HALL AND SARDESON—EOLIAN DEPOSITS OF MINNESOTA. by their superjacent position which also determines their relative age. Their relation to fluviatile post - Glacial deposits is that of a con- temporary. At Minneapo- lis the fossiliferous gravel, stratified sand, and marsh peat of an ancient Missis- sippi River channel were formed contemporaneously with the lag gravels and dune sands lying on the terrace which was the bank of the river prior to the time when Saint Anthony falls were situated one and one-half miles below their present
. Bulletin of the Geological Society of America. Geology. 360 HALL AND SARDESON—EOLIAN DEPOSITS OF MINNESOTA. by their superjacent position which also determines their relative age. Their relation to fluviatile post - Glacial deposits is that of a con- temporary. At Minneapo- lis the fossiliferous gravel, stratified sand, and marsh peat of an ancient Missis- sippi River channel were formed contemporaneously with the lag gravels and dune sands lying on the terrace which was the bank of the river prior to the time when Saint Anthony falls were situated one and one-half miles below their present position. The rela- tion of the eolian deposits to the fluviatile and these in turn to the glacial drift is evidence that the river's domain at that time was within a channel, and, fur- ther, that the earlier formed terraces were neither a lake accumulation nor a glacial river product. Incidentall}^ the accompanying section (figure 2) shows that the Mississippi river has done an amount of work in addi- tion to the cutting of the gorge in which it now flows, on which cutting estimates of the length of post-Glacial time as determined by the Mississippi river are often Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York : The Society]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
