192 F. D. Chester—Distribution of Delaware Gravels. 
and railroads traversing the region, whenever the talus slopes 
ean be sufficiently removed to give perpendicular cuttings, yet 
tain as great a thickness along the southern line of our present 
e north, one well near Middletown failing to pene- 
area as to 
trate the red gravel at a depth of 35 feet. 
-- a 
3 {+ 
MAP SHOWING ; &y ae 
DISTRIBUTION OF if een 
DELAWARE GRAVELS vf Greenbaly= A.’ 5 
/ WIKMING “V5 J 
Northern area FEDchester, / Minttowmes = "$- +" + lA Ns 
to Gree cae wre. s . 
al * ‘ * TANT? merge Te 
\ Vb as , e eee 
Vs pace 2 HEWERS ay 
a CHRISTI 
A ae - e is * 
truck Holl * 
~~ - --* 
: INE 
SI ope gHiTpze="s aye 
* sping 
a . 
7 
——" 
Cc oe a! + % 
ff = ravelly Hilt | =» « oa awe es 
§ ° Woodlawn: ea ‘‘ a = - 
te » - od ry « a * *@ - 
~ mF a 2 fe i i m 
\* ve 2” ELKTON Sew ee og 
, Sine Sa, oem “5 er ag - ia so? 
; > . 7 
Ns ie eet fn 8. Ft ae RS 
va ak WORTHEAST > I> Ko DELR cat) 
‘ arleston * * s ay * bY kyo o Per ae 
“7% “> @- . pen: Mpa ee 
GAC © QOS =.» Nsenmitaridgs Soe 
> » a) ofp 2 + * a3 
» * i Ld A ~- “et. OR ga le . 
PO tae tee eS i a Sf lint, 
se Cit + ‘ «<. pens | a 
a +4 
, Ree Bees - PES 
— bd oe Wey ihe « Page, 
“2. * “4 oder ete Oe 
Hi ‘oe >the +e - al 
« . ae | . om 
a4 os S MIDDLETOWS, « 
eon a a ,* 
a a Ss Owing ad eo* 
° Pete Warwek | ss . ° « oe *. 
. on a < ag ea I * ‘ ns ys 
. Cecili °o « ‘s . . wh ' a « 
. . . 
ne . Ss « ~ a Pee = 
« ‘ 2 ae oe 
From the identity of this gravel with the deposits described 
by Professor H. Carville Lewis* as found along the valley of 
the Delaware River both north and south of Philadelphia, it 15 
evident that the same is a true river gravel and similar to al 
the deposits which our present streams lay down over the beds 
of the estuaries into which they empty. 
From the universal coarseness of the gravel, also, together 
with the abundant evidences of flow-and-plunge structure, 
more particularly shown along the northern line, it is evident 
that the same must have been deposited by a swift current, and 
* Geology of Philadelphia. Lecture before the Franklin Institute, Jan. 12, 1882- 
