man Ki eo 
Geology and Mineralogy. 69 
mencement of this era of late and temporary prune op and I 
am still unable to see any need for changing my old views. I 
older 
ers erosion out of the hea and soft hotizbrital layers of e 
coal-measure mass. 
hae | ust received a letter from Prof. White, announcing an 
important discovery bearing weightily ape the subject in ques- 
tion, made by Prof. Fontaine and himself about two miles from 
Morgantown sai est Virginia, Here a broad level reach of 
Pennsylvania State line e tically exa the e 
area of the Flats was pao ae to be “covered to an unknown 
depth with a very fine, tough, aluminous, creamy-white clay, con- 
um 
ne} immense i of vegetable remains in the m ost perfect 
state of preservation of which it is possible to conceive.” Only a 
small collection has as yet been made and a few weeks must 
elapse before a sufficiently large collection can he made to decide 
non ya how far the plant-forms differ from those of our present 
ocal fi 
The top of the deposit is about 300 feet above the river, which 
would make it more than 1,200 feet above tide. English geolo- 
gists would be very apt to suggest a glacial dam at Pittsburgh to 
account for such deposits in the water basin of the Monongahela 
River. But there is no such short cut to an explanation . a 
phenomenon coéxtensive with half a dozen States of the Uni 
r. White says the level of the Flats must be about ths hits 
vith: that of the pe lays so extensively worked at Greens- 
boro and Geneva in Fayette County. He adds that on the 
Second Tecan! ” (of Prof. Stevenson’s series) below nec 
town, Mr. Keek in sinking a well 70 feet deep, passed through 
shan ging silt and clays, and no rock. Prof. Stevenson’s third 
pe tt of Progress lettered KKK) is just coming from the press, 
will be read with great rata by geologists who busy them- 
selves with the more recent ¢ 
2. Cretaceous and Tertiary of Charles ton, S. C. — Lieutenant 
A. W. Voeprs, U.S in a communication to the Charleston 
News and Courier for yer ril Oth, st ates that in the Artesian bor- 
ing at the Citadel, Charleston, the Cretaceous formation was 
reached at a depth of 950 feet, "where oceurred Eco. ogyra costata, 
and other fossil shells, among them a new Cham 
names Chama Charlestonensis, The Ezogyra continued to be 
brought up si a depth of 1 825 feet, and with it at the lower 
depth ~— china’ sr tychodus Mortoni, Gryp. Pitcheri, 
etacea, etc. The present depth of ‘the SS is 2,870 feet , 
and Lieuioaaal Vogdes believes that they ai in the 
“second bed of the Cretaceous above the undies g sili, 
Specimens of water-worn gravel and sand of decomposed granite 
