488 
the surface of the latter; 3. A silt deposit, 
probably of Iowan age, which caps the 
weathered surface of the Illinoisan drift ; 
4. The Wisconsin drift with its several 
moraines. Lobation of the ice sheet in the 
Scioto basin; direction of striz, and changes 
of drainage produced by glaciation are also 
discussed. 
‘ Lateral Erosion at the Mouth of the 
Niagara Gorge,’ G. Frederick Wright, 
Oberlin, Ohio. 
The results of an accurate survey of the 
east face of the gorge are given, affording 
an opportunity to compare the present face 
of the gorge with that presented in 1854 and 
furnishing a standard datum for future com- 
parisons. The rate of erosion thus de- 
termined seems to favor shorter chronol- 
ogies for the age of the gorge. 
‘Age and Development of the Cincinnati 
Anticline,’ August F. Foerste, Dayton, Ohio. 
Along the axis of the Cincinnati anticline, 
from Stanford in Lincoln County to near 
Lebanon in Marion County, Kentucky, the 
Devonian rests on the Ordovician. On the 
western flank of the anticline the Devonian 
rests, first on the lowest member of the Si- 
lurian (the Clinton) then on the succes- 
sively higher members, the Niagara, Osgood 
shale, Laurel limestone, Waldron shale and 
Louisville limestone. On the eastern flank 
it rests first upon the Clinton next upon the 
Osgood shales. The formation of the anti_ 
cline began previous to the deposition of 
the Devonian. Its growth was arrested 
during late Silurian and early Devonian 
times and a large area above sea level was 
reduced to,a peneplain. On this peneplain 
the Devonian limestone was subsequently 
deposited, but unevenly, owing to the ine- 
qualities of the peneplain. The Devonian 
black shale however was deposited over 
the entire anticline. This formation con- 
tains marine fossils at its base and land 
plants over the anticline region. These are 
generally believed to be the remains of the 
SCIENCE. 
[N. S. Von. X. No. 249. 
earliest land plants. After the deposition 
of the Devonian the folding continued, the 
maximum taking place in post-Devonian 
times. The facts seem to indicate that the 
anticline was not in existence during Clin- 
ton and Osgood times, but that it began in 
late Silurian to early Devonian time and 
had its maximum development ia post-De- 
vonian time. 
‘The Silurian-Devonian Boundary in 
North America,’ Henry 8. Williams, New 
Haven Conn. 
‘The Section at Schoharie, N. Y., John 
J. Stevenson, New York, N. Y. 
‘The Geological Results of the Indiana. 
Coal Survey,’ George H. Ashley, India- 
napolis, Ind. 
“The Cape Fear Section in the Coastal 
Plain,’ J. A. Holmes, Chapel Hill, N. C. 
‘Triassic Coal and Coke of Sonora, 
Mexico,’ E. T. Dumble, Houston, Tex. 
‘Some Geologic Conditions Favoring 
Water Power Developments in the South 
Atlantic Region,’ J. A. Holmes, Chapel 
Hill, N. C. 
The ‘ fall line’ between the coastal plain 
and the Piedmont plateau is the zone where 
the most favorable geologic conditions for 
the development of water power are found. 
In the region of the crystalline schists the 
lesser geologic boundary lines, separating 
belts of slates, schists, granites, etc.; shear- 
ing lines or zones and fault lines, supply 
favorable conditions on a smaller scale. 
Within certain areas of bedded or schistose 
rocks, variations in the composition and 
obduracy of the rock masses furnish suita- 
ble conditions. 
(a) ‘ Paropsonema: A Peculiar Echino- 
derm from the Intumescens Fauna, New 
York.’ 
(6) ‘Remarkable Occurrence of Ortho- 
ceros in the Oneonta Sandstones of New 
York.’ 
(ec) ‘The Squaw Island Water Biscuit, 
Canandaigua Lake, New York.’ 
