75 



line tifteen miles south of the Iliinoi.s ami Indiana corner-stone, and passing east- 

 ward live luiles and three-quarters, then turning northward, taking in the town 

 of Griffith and becoming much broader, it bears northeast and connects with the 

 other ridge near Ross, half way across the county. This ridge seems to have been 

 once washed by Lake Michigan's ''proud waves." South of these main ridges 

 and large sand barriers are four special sand banks or small ridges tiiat are worth 

 inspection. One is three miles west of the north end of Red Cedar Lake, a large 

 bank on the West Creek Bluff out of which a few years ago a number of human 

 skeletons were taken. The second is on the northeast shore of that lake, where, 

 also, human skeletons, some twenty in number, were taken out in 1880, and where 

 is now a known, undisturbed Lidian burial ground. The third is one mile and a 

 half west of Crown Point, near one of the head branches of Deep River. It is 

 known as the Beaver Dam and is near a large marsh. The fourth is three miles and 

 a half east of Crown Point, near one branch of Deep River. In the north part of 

 Crown Point sand comes within a few feet of the surface, but some prairie soil 

 now lies over it. 



The immense bed of sand over the Kankakee marsh region, some five miles 

 in width, is covered by several feet of muck. L nlike the deep white and yellow- 

 ish sand of Lake Michigan, this marsh sand makes excellent roadbeds, five, north 

 and south, marsh roads having been made with it. 



No time now remains for noticing what these few facts indicate in regard to 

 the physical conditions here somewhere back in the mighty past. 



ACCOL'NT OF A MoRAIMAL StOXE (^UARRY OF UpPER -SiLURIAN LIMESTONE 



NEAR Richmond. 



That bowlders, or rock fragments in some form are to be found in the track 

 of a glacier, is one of the most familiar of phenomena. From Maine to Minnesota, 

 and beyond, these fragments are in a direction southerly, with greater or less 

 deviation, from the rock masses to which they previously belonged. Lines of 

 boulders, pebbles, sand and rock-paste are strung along or spread in tiie course of 

 the ice sheet; granite irom granite cjuarries, gneiss from gneiss beds, quartz from 

 quartz veins, conglomerate from conglomerates, copper from copper deposits, and 

 so on from wherever they were formed in place. 



But that an acre, more or less, of stratified rock should be grasped, en masse in 

 the great ice palm and dragged or shoved for miles is not so common. 



