. Beach profile changes - east coast of Lake Michigan, 1970-72. Beach erosion; Coast changes. Geomorphology. Beach at Summit Township Park (Mason County) has a shoreline orientation of °W. and is adjacent to bluffs of glacial drift. At times, glacial till was observed cropping out just lakeward of the plunge step. Foreshore comprised of well-sorted and rounded cobbles. Large percentage of the sand in backshore is from a sand terrace where the upper swash of waves has undercut the terrace and vertical slope has failed. Bench Mark Location (5 August 1970) (,mh, sec. 23, N. , R. 18 W.). I
. Beach profile changes - east coast of Lake Michigan, 1970-72. Beach erosion; Coast changes. Geomorphology. Beach at Summit Township Park (Mason County) has a shoreline orientation of °W. and is adjacent to bluffs of glacial drift. At times, glacial till was observed cropping out just lakeward of the plunge step. Foreshore comprised of well-sorted and rounded cobbles. Large percentage of the sand in backshore is from a sand terrace where the upper swash of waves has undercut the terrace and vertical slope has failed. Bench Mark Location (5 August 1970) (,mh, sec. 23, N. , R. 18 W.). Immediately fronting large, dead maple tree, just south of Summit Park. Azimuths (from north): 83°04', north of maple tree; 20l''lS', Little Sable Point; 343°19', end of groin; 351°39', large stump west edge. June 1970. 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 Davis, Richard A. (Richard Albert), 1937-; Fingleton, W. G; Pritchett, P. C; Coastal Engineering Research Center (U. S. ); Western Michigan University. Ft. Belvoir, Va. : U. S. Dept. of Defense, Dept. of the Army, Corps of Engineers, Coastal Engineering Research Center ; Springfield, Va. : for sale by the National Technical Information Service
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