U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

PROFESSIONAL PAPER 1415-B
Hydrophysiographic regions in the glaciated Northeast PLATE 1
Randall, A.D., 2000, Hydrogeologic framework of stratified-drift aquifers in the glaciated Northeastern United States

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EXPLANATION
REGIONS NORTH OF THE WISCONSINAN DRIFT BORDER BROAD LOWLANDS INUNDATED BY LARGE WATER BODIES
THAT GENERALLY SLOPED AWAY FROM THE ICE DURING DEGLACIATION. FEW OPPORTUNITIES FOR
INDUCED RECHARGE FROM LARGE STREAMS;
MODERATE TO LOW RELIEF; VALLEYS CLOSELY SPACED, COARSE STRATIFIED DRIFT DEPOSITED EARLY IN
COMMONLY SMALL OR SHALLOW DEGLACIATION IS SPARSE AND SCATTERED
Coarse stratified drift abundant Surficial sand-plain aquifers common atop extensive fine-grained
| stratified drift
E | Eastern Hills and Valley Fills: coarse stratified drift
‘widespread in most valleys Surficial sand-plain aquifers uncommon: fine-grained stratified drift
ae generally at or close to land surface
oO Outwash plains: coarse stratified drift widespread all across
- the landscape, inundating valleys and most hills za Mountain-front deltas, largely perched above modern stream grade,
deeply incised, grading downward to fines
Coarse stratified drift negligible
[| Tug Hill Plateau REGIONS OF HIGH RELIEF THAT SLOPED TOWARD THE -
- ICE SHEET. SURFICIAL AQUIFERS UNCOMMON, FEW
E I ag "| Pocono Plateat: OPPORTUNITIES FOR INDUCED RECHARGE FROM
by 5 LARGER STREAMS
| | Northeasternmost Adirondacks
Ui Mountains bordering Champlain lowland: scattered high deltas,
j || Center of residual ice-cap area in Maine largely perched above modem stream grade; fine-grained
ee stratified drift generally at or near land surface in valleys
IN Coarse stratified drift sparse, on fringes of Maine residual ice-cap
TM] area, and distributed as follows: in | North rim of Appalachian Plateau: multiple drift sheets common in
Mostly perched on the sides of lake-dominated valleys major valleys, consisting chiefly of interlayered diamicton and
lake-bottom fines; drift in many valleys is 500 to 1,000 feet thick
Mostly in narrow valley fils capped by till
Meaty in eshers REGIONS AT OR BEYOND THE WISCONSINAN
HIGH RELIEF; MAJOR VALLEYS WIDELY SPACED DRIPT;BORDER'
= M__| Eastern Mountains: stratified drift commonly coarse grained and commonly fase Terminal moraine in. New Jersey: bedrock valleys contein Wisconsinan and
perched above modem stream grade on valley sides; valley fills less than older sand and gravel beneath thick til and locally fines
i Gatrock: \
\ 21600 feet wide} mostly cepxzed by lhwyherrsst scattered ours Lv] Region south of the Wisconsinan drift border where the larger valleys \
1 hace ; - ; “sloped away from the ice and now contain significant saturated
Catskill Mountains: stratified drift commonly coarse grained: valley i : D :
= fills less than 2,500 feet wide, mostly capped by alluvium, icles of Sane neal esc seston i) ei
\ locally narrowed by thick till on hillsides eee eerie =
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tel Eastern Appalachian Plateau: valley fils mostly 2.000 to 8,000 feet bY) Y ‘VG ¢ ae
* wide. 100 to 500 feet thick, increasingly fine-grained where di \ y f }
\ thickness increases; basal coarse facies common Peterporough? .
ny Ad (afl feitevitie .
ni _| Western Appalachian Plateau: broad intersecting valley fills; multiple V : a Zy i
\ drift sheets common in valleys and uplands ~ Joke 4 \
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Base from U.S. Geological Survey

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HYDROPHYSIOGRAPHIC REGIONS IN THE GLACIATED NORTHEAST