CLINTON CONGLOMERATES AND WAVE MARKS. 55 
Lower or possibly even the Upper Hudson, rather than the Mid- 
dle division, under which the reference happens to occur. 
Upper Hudson.—Cross-stratification occurs in the lower beds in 
Clark county ; it is said sometimes to resemble large wave marks. 
The same conditions seem to occur also in Montgomery county. 
Wave marks occur in Oldham, Lincoln, and Fleming counties. 
Their position in Oldham seems to be somewhere beneath the 
top; in Lincoln they are found at many horizons; in Fleming 
they are located near the top of the series. In Spencer county 
indurated clay balls are found in the earthy limestones and 
shales near the top of the Upper Hudson. Under ‘Disturbances in 
Clark and Montgomery Counties”’ rounded pebbles of limestone 
are said to occur in some of the strata of the Upper Hudson. 
Observations by E. O. Ulrich..—At the base of the Lower Hud- 
son there is generally a layer of limestone, one foot or so in 
thickness, which usually contains some rounded limestone peb- 
bles. No localities are given, but Mercer, Boyle, and Washing- 
ton counties are mentioned in the preceding sentence, and the 
occurrence of these features here and in other counties of central 
Kentucky may be inferred. See, for instance, the reference to a 
similar layer at the same horizon in Washington county, given ~ 
above from the Kentucky Survey. In West Covington opposite 
Cincinnati, and about a mile west of the mouth of the Licking, 
the conglomerate occurs, which is to be more fully described, 
just below, from personal observations made in company with 
Mr. Ulrich. This locality belongs to the Lower Hudson, or the 
Utica of Ulrich. It is described by Professor N.S. Shaler in one 
of the earlier reports of the Kentucky Geological Survey. The 
waved-layers, which occur at several localities near Cincinnati, 
are correlated with the wave-marked layers so frequent near the 
top of the Lower Hudson in the other counties of Kentucky 
(Am. Geol., 1888, page 314). 
In Washington, Boyle, Lincoln, Garrard, Madison, and Clark 
counties, the strata belonging to the top of the Middle Hudson 
and the bottom of the Upper Hudson are decidedly arenaceous, 
American Geologist, 1888, May, pages 308-310. 
