ENPages
p.7
[list of stones]
June 1846 - The study of the organic remains of this uncouth irregular unstratified limestone shows the following singular state of facts. It contains cateripora escharoides (5) not found below the "upper part of the Niagara group". Hull report. It contains Cyathophyllum dianthus (11) which belong to the Onandaga Limestone. It containts the Trianthus Backis which is not found above the Hudson river group - is characteristic of the Utica slate.
p.8
It contains Pentamerus oblongus which is characteristic of the "Clinton group" and gives name to the Pentamerus Limestone a division of that group. It contains other fossils resembling those of the "Coniferous Limestone" Querie? - Does it belong to the Utica Slate - the Hudson River Group - the Clinton Group the Niagara group or the Onondaga Limestone, or the Coniferous Limestone? Or is it the concentrated essence or embodyment of the whole series?
Hall refers it to Niagara Limestone - see letter July 15 1846
p.9
Limestone on L. Mich & Mich. river
On Sec 21 Town 8 Range 22 is a bed of limestone rock in place on the shore of Lake Michigan, rising about three feet above the water & covered by 100 feet or more of clay & sand. This rock is easily broken up by the action of the waves so that every year it presents a different aspect from what it did before. When I first visited it there were seen diluvial scratches running NE & SW which have now disappered. It appears to have a dip towards the south at this point. The same rock appears in the bed of the Milwaukee river a little above the saw mill dam on SW 1/4 sec 4-7-22, being three miles due south of the above, and it here has an elevation of 21 feet above the lake as ascertained by leveling: hence there is an ascent to the south of 18 ft in 3 miles or six fet per mile. The lythological and fossil character of the rock is the same at the two points and hence it is probable that this is the true dip n that direction. The true dip hoever or greatest dip is probably towards the N.E. This rock is therefore geologically higher in the scale than that fuond at Pettibones quarrey on the Menomonee (geodiferous limerock) - for this rate of dip would bring the rock at the quarry 48 ft above the lake, which is higher than the top of the ledge. But the dip in this direction is probably more than six feet per mile.
