EASTERN AND SOUTHERN UNITED STATES. 
123 
It is very likely that hoth divisions of the Miocene indicated by me as occurring in 
Maryland and Virginia,* and by me designated as the “ Marylandian ” and “ Vir- 
ginian,” or the lower and middle Atlantic Miocenes respectively,! will eventually be 
found to be-equally well marked off in New Jersey, although up to the present time, 
from the sparseness of the fossil remains that ha\"e been collected, no such subdivision 
could be satisfactorily attempted. But from what material we have at hand, it may 
be safely asserted that the localities which have been so assiduously searched in the 
neighborhood of Shiloh, and elsewhere in Salem and Cumberland Counties, belong to 
the older or “ Marylandian” division. J 
No satisfactory evidence has yet been brought forward proving the existence of 
any marine Pliocene deposits in the State. 
Delaware. 
We possess but very little precise information respecting the Tertiary formations 
of this State ; no really accurate survey has here ever been carried info effect, and our 
present geological and paleontological knowledge of the region is based largely upon 
the “ Memoir of the Geological Survey of the State of Delaware,” of Prof. J. C. 
Booth, published in 1841. I am not aware that the Eocene formation has been abso- 
lutely identified by its fossil remains as occurring in the State, but no reasonable 
doidit can be entertained as to its existence there (although possibly entirely obscured 
bv the newer Miocene deposits) as a dnect continuation of, or connection between, the 
belts developed in Maryland and New Jersey. The northern boundary of the forma- 
tion, corresponding to the southern boundary of the parallelly trending Cretaceous 
formation, will be found to lie along and somewhat to the north of the Appoquini- 
mink, holding, probably, a more or less S. W.-N. E. direction. The southern third 
of the State appears to be in principal part covered by either very late Tertiary, or, 
what seems more likely, by post-Tertiary deposits ; these are described as occupying 
the whole of Sussex County and the southern portion of Kent, defining the southern 
limit of the Miocene along the Murderkill and its tributaries. Prof. Booth recognizes 
two principal divisions in the Delaware Tertiaries, which he designates the northern 
and southern Tertiaries, but these have no special significance, being founded on 
purely geographical and lithological, and without reference to paleontological, char- 
acters. Still, more careful examination may prove them to correspond in a general 
way with the two Miocene divisions to which reference has already been made when 
treating of the geology of New Jersey. The invertebrate fossils specifically identified 
by Boo'th as occurring in the Miocene deposits are : Yenm alveata, Vemis inocerami- 
* Proo. A. N. S., 1880, p. 20, et seg. ; 1882, p. 150, et sfg. 
S neUprti Iht^sLugrapliical Evidence afforded by tbe Tertiary Fossils of the Peninsula of Mary- 
