184 THE JOURNAL OF GEOLOGY. 
found in this ferruginous rock (which included both sandy and 
oolitic layers) were Platyceras (Platystoma) Niagarense, the 
small Soldiers’ Home form, Lepteena rhomboidalis, Orthis ele- 
gantula, and good specimens of Aspidopora parmula. By far 
the most interesting feature of the locality however was the 
presence of great wave marks, wonderfully distinct and well 
exposed for a distance of a hundred feet down the creek. The 
line of strike of these wave marks was magnetically about north 
65° east. The crests of the wave marks were about two inches 
above their greatest depressions, and the distance from one 
crest to the next was on the average about 28 inches. They 
sloped northwards a little more steeply than southwards. This 
wave-marked layer is only from one to two inches in thickness, 
and immediately overlies a great mass of pebbles, imbedded in 
the Clinton just beneath. These pebbles sometimes project 
strongly into the sandy layer above, which shows the wave 
marks. The pebbles are on the average larger than at any place 
where pebbles have so far been seen in the Clinton. Plenty 
of them are 12 inches in diameter, and many of them range 
between four and eight inches. As usual, the pebbles are only an 
inch to an inch and a half in thickness. Lithologically they 
are similar to the sandy stratified layers of the Clinton limestone, 
found characteristically in the lower half of the Clinton in this 
part of the state, and occurring also at higher levels. If there 
had been any doubt hitherto about the Clinton age of these peb- 
bles, it was dispelled by the fossils found in some of the pebbles 
at this locality. The pebbles here were again almost invariably 
unfossiliferous, but there were so many pebbles in the rock, and 
the conglomerate layer was so well exposed, that it was possible 
to break out enough pebbles in a short time to make a satisfac- 
tory examination. Three of the pebbles contained fossils. The 
forms found were Illenus daytonensis, fragment of a glabella, a 
rostrum probably belonging here, and a very good pygidium ; 
Cyphaspis clintonensis, the middle parts of two heads in a very 
good condition; half a dozen specimens of a small form of Orthis 
elegantula, and a young Rhynchonella, probably Rh. scobina. 
