CLAYS    OF    CAPE    COD,   MASSACHUSETTS. 
Geologic  section  of  the  Cape  Cod  region. 
433 
P-i  <s 
a  2 
2  '3 
a  os 
.2  « 
WO 
o  n 
-A   C 
3  O 
Formations,  etc. 
Recent  deposits. 
Wisconsin  drift. 
Not  recognized.  Prob- 
ably represented 
by  a  long  erosion 
period,  with  land 
elevated. 
Unnamed. 
Montauk  drift. 
Herod  gravel  (often 
cut  out  by  ice  ero- 
sion). 
Jacob  sand  (some- 
times cut  out  by  ice 
erosion) . 
Gardiner  clay. 
Jameco  gravel. 
Unconformity  of 
erosion. 
Mannetto  gravel. 
Character  of  deposits 
Salt  and  fresh  water  marsh  deposits,  dunes,  sand  bars,  and 
spits. 
Morainal  deposits  and  outwash  gravels  and  sands. 
No  deposits  recognized  on  Cape  Cod. 
Sands  and  gravels  with  granite  pebbles. 
A  till  made  up  of  brownish,  greenish,  or  gray  sandy  clay  with 
pebbles  and  occasional  bowlders.  Formed  by  reworking  of 
Gardiner  clay  and  older  gravels  by  ice  sheet. 
Sands  and  gravels  with  granite  pebbles. 
Yellowish,  greenish,  and    brownish    sandy  clays    or   clayey 
sands,  alternating  with  fine  gray  to  buff  sands. 
Light  to  dark  gray  nearly  black  clay,  weathering  to  a  greenish 
or  brownish  color. 
Sands  and  gravels  with  granite  pebbles. 
Deposits  are  below  sea  level  in  Cape  Cod  region. 
Sand  and  gravels,  largely  quartz,  but  with  a  few  decomposed 
granitic  pebbles.     Below  sea  level  in  Cape  Cod  region. 
White  or  yellowish  quartz  sands  and  gravels,  with  clays  of  white,  gray,  and  various 
other  colors.     Below  sea  level  in  the  Cape  Cod  region. 
a  Correlations  are  provisional,  and  are  based  on  similarity  of  succession  and  history  of  the  Glacial 
deposits  of  the  Long  Island  and  interior  regions. 
