BEACHES OF LAKE WARREN. 763 



barometric determinations give the ridges in Ballville Township a siinihu- 

 altitude. There appears to be no well-defined lower shore north or west of 

 Clyde. Sand ridges appear east and south of the village up to an altitude 

 about 710 feet above tide. These, however, were probably drifted by wind 

 above the level of the old lake. 



From Clyde a very definite shore leads northeastward to Castalia. It 

 presents usually a cut bank 10 feet or more in height, on whose face and 

 crest deposits of sandy gravel occur. There are also sandy ridges for some 

 distance south of this old shore. Before reaching Castalia the beach 

 comes to a limestone cliff and follows its western base past that village. At 

 the north end of the cliff, about a mile northeast of Castalia, the beach turns 

 eastward and rc-curves as a spit along the east side of the clifiP. 



From this cliff southeastward for several miles the beach is ill defined, , 

 though sandy ridges near Bloomingville and Prouts station seem to repre- 

 sent it (see PI. XXII). About a mile east of Prouts a definite ridge of 

 sandy gravel sets in which leads southeast another mile. Back of it 

 a slightly higher ridge appears and leads southward to Huron River, 

 passing just east of the village of Enterprise. It crosses Huron River 

 3 miles west of Milan, near the line of Erie and Huron counties. This 

 ridge is composed of sandy gravel, is 3 to 6 feet in height and 50 to 75 

 yards in width. • It is remarkably regular for 3 miles north from Huron 

 River and also for a similar distance on the east side of that stream in 

 northern Huron County. 



On Marblehead Peninsula, north of Sandusky Bay, there is a small 

 tract which stands sufficiently high to catch what appears to be the Forest 

 beach. Its altitude is very nearly 100 feet above Lake Erie, or 670 to 675 

 feet above tide. It is developed for a distance of fully 2 miles, setting in 

 about a mile east of Lakeside and following the north border of the penin- 

 sula to that village, after which it bears southwestward into the interior. It 

 is a low ridge, 3 to 5 feet high, composed, in large part of blocks of lime- 

 stone, but occasionally containing gravel. The rocky character of this 

 beach is strikinglj^ similar to that of the shore of Lake Erie below it, wliere 

 the waves are now piling up blocks of limestone derived from the cliffs of 

 the peninsula. 



The beach which crosses Huron River 3 miles above Milan presents a 

 well-defined gravelly ridge as far east as that village, but is rather indefinite 

 from tliere northeastward to Vermilion River because of wind action, 



