108 G. F. LAMB 



It will be interesting to note the most exaggerated conglomeratic 

 development found. It occurs at the base of the Sharon as exposed 

 in the gorge at the village of Parkman, Geauga County. Lying 

 directly upon the Cuyahoga, and representing a stream velocity 

 of probably 3 miles an hour, is a 3-foot bed composed not of pebbles 

 alone, but of cobble stones, or pieces of flagstone from the Cuyahoga, 

 some angular, some rounded and flat and well worn, 2 to 3 inches 

 thick and more than a foot in diameter, standing and lying in all 

 positions and mixed with sand and pebbles. It is a veritable 

 picture of the stones and gravel and sand all mixed that we have 

 all seen many times on the inside curve of streams. A more con- 

 vincing evidence of stream deposit in former ages can hardly be 

 found. 



It is worthy of note here that two distinct stages in the deposi- 

 tion of the Sharon are displayed in this gorge. At 10 or 12 feet 

 above the base the conglomeratic character is entirely absent, a 

 rather fine soft sandstone occurs, the top of which is quite undulat- 

 ing, as if eroded. Resting directly upon the undulating surface, 

 with a sharp line, is the massive conglomeratic rock characteristic 

 of the Sharon. The transition is sudden and very conspicuous and 

 is well shown at a number of points in the gorge. 



At Nelson Ledges the base of the conglomerate lies at 956, and 

 h mile west conglomerate is found at 1,160 above sea. This whole 

 thickness of 204 feet is not to be assigned to the Sharon, however. 

 Overlying sandstones are conglomeratic in this locality and suffi- 

 ciently so to be mistaken easily for the Sharon itself. Two miles 

 south of this point and about f mile south of Nelson village at 

 Ledge Haven Mill conglomerate rock is found on Tinker Creek. 

 There are clearly two stages of conglomerate formation here. The 

 bed of the creek below the fall is conglomerate of unknown thick- 

 ness. It is directly overlain by 5 to 6 feet of dark gray sandy shale 

 and this is overlain in turn by 30 to 40 feet of conglomerate. The 

 top of the lower stratum lies at 952, as seen at the foot of the fall 

 beside the mill. The shale stratum is strongly suggestive of the 

 horizon of the Sharon coal. It also strongly suggests relationship 

 to the two-stage phase of the conglomerate observed in the Parkman 

 gorge. At the latter place this transition occurs at a level of about 



