ln> The American Geologist. February, is 6 
Potomac beds was exhibited, the section being Lafayette reddish clay, 
r> feet: the Potomac formation, consisting Buccessivelj of sand, 55 feet, 
"chalk" (a mixture of fine white sand and kaolin), 30 feet, and sand 
and sofl sandstone, with some clay, "335 fee^ reaching to a total depth 
of Mio feet, where the boring passed into granite. In a deep well at 
Florence, the Newark sandstone was reached, far south of its previously 
km '\\ a arras. 
Re's it me" of general stratigrajthic relations in the Atlantic coastal 
I, I, tin from Netc Jersey to South Carolina. N. H. Darton. A scries 
of five cross sections was displayed, illustrating the larger si ratigraphic 
features. Deep well borings at many points have been the most impor 
taut sources of new information, and of these Mr. Darton has made a 
special s1 udy for a report now in c< mrse of publication. His field studies 
m South Carolina, described in the previous paper, indicate some of t lie 
relations of the lower Coastal Plain formations where formerlj there was 
much obscurity: and the recent investigations by Dr. W. B. Clark have 
added much to knowledge of the Upper Cretaceous in New Jersey and 
eastern Maryland. 
The relationship of the Potomac, marine Cretaceous, and Eocene for 
mations in South Carolina is due to an overlap of the Eocene soul hWard 
beyond the edge of the marine Cretaceous strata. The Cretaceous marl 
and clay marl sei'ies of New Jersey has been so uplifted and eroded in 
post Cretaceous times thai in the present outcrops its upper members 
drop out one by one in its extension into Maryland, and only the lowest 
member reaches the surface in the latitude of Washington. The series 
is o\ erlain by the Miocene to the westward, notably in central southern 
New Jersey and opposite to Washington: but in the greater part of the 
M'arvland region, and apparently also in southeastern New Jersey (as 
shown by well borings), it is overlain by the Pamunkey formation 
(Eocene). 
The Magothy formation, although a thin and very arenaceous mem 
her of the Coastal Plain series, has been found to be widespread in east 
era Maryland, and to extend far northward into New Jersey, where it 
appears to be represented by water bearing gravels and sands thai are 
revealed 1>\ many well borings in the western side of the southern por 
tion of the state. It lies between the Raritan (Potomac) clays and the 
base of the clay marls or Matauan formation of Dr. Clark. 
Abundant new data have been received, mainly from well borings, 
bearing on the thickness, character, and extent of the Chesapeake 
(Miocene) formation in Virginia, Maryland. Delaware, and New Jersey. 
The Natchez formation. T. C. Chamberlin, Chicago, III. (Read by 
title. i Alternating stages of deposition and erosion of the Pleistocene 
stratified gravel, sand, and fine silt of the immediate valley of the 
Mississippi river in the vicinity of Natchez, Mississippi, are described 
from- observations during the year 1895, with examination of well ex 
posed sections. The Natchez formation and associated deposits and 
staevs of erosion are of especial interest on account of their probable 
