FIG. 5. Sample of Jasper conglomerate found plentifully on the sur- 

 face around the lake. The specimen is eight inches In diameter. 



FIG. 6 Samples of the post-glicial conglomerate found near the 

 mineral springs in Cherry Creek embaymsnt and in large masses at 

 Wabash. The glacial pebbles are resting in a matrix of ordinary sand, 

 the whole cemented by the calcareous water of the springs. It is not easily 

 fractured. The above is now in the ge:>logical collection of the Field Mu- 

 seum where it is unique in being the only evidence of a calcareous conglom- 

 erate formed by calcareous springs. 



