542 F. BASCOM 
Miocene deposits 
Unconformity 
St. Mary’s: sandvand tela... 203. yee tne | ae ee 280 feet 
Choptank: sand, clay; and marl). 099). ee eee 175 eee 
Unconformity 
Calvert: sand andiclay 73. ¥ es vss' cs aa celle Sate ee 310 feet 
Unconformity 
Eocene deposits 
Nanjemoy: Sand.) .4ccc0l 54 oho eiee ee ee oe 125 feet 
Aquia: greensand \ 35.502 e Oana oe dene ee 100 feet 
Unconformity 
Upper Cretaceous (Cretaceous) deposits 
Manasquan: clay andisands{22.7,..402.0 0. 00000 tee 50 feet 
Rancocas; preensand . 2 &.v 4202 a ehean oie ee Ue 80 feet 
Monmouth:/sand)sniio.5.. nae beh oe ae oe a ee 100 feet 
Unconformity 
Matawan: micaceous sandy clay....... lo 70 feet 
Unconformity 
Magothy: sand and clay...... diene specs ee 100 feet 
Unconformity 
Raritan: clay andysand < 2.0.00. 54040 oe 2 eee 350 feet 
Unconformity 
Lower Cretaceous (Comanchean) deposits 
Arundel: clay and sand........ Ten R IRONS 66 ooo 3 125 feet 
Unconformity 
Patapsco:\clay and isand?)).2 7.) 25.51.50: 440 eee 200 feet 
Unconformity 
Patuxent: sand:antid arkose. © 02.0.0 0)0 oi ean a ee 350 feet 
Unconformity 
Crystalline formations 
With the Cretaceous, Tertiary, and Pleistocene registration of 
continental movements before us, it is no longer possible to believe 
that the erosion history of this region is told in two cycles of erosion, 
producing two peneplains: the Kittatinny,' or Schooley, of 
Cretaceous age, and the Shenandoah, or Somerville,? of Tertiary 
age. That there is topographic evidence of more than two erosion 
t Bailey Willis, ‘‘The Northern Appalachians,” Nat. Geog. Mon., 1895, pp. 1690- 
202. C.W. Hayes, “The Southern Appalachians,” Nat. Geog. Mon., 1895, pp. 305-36. 
C. W. Hayes'and M. R. Campbell, “‘Geomorphology of the Southern Appalachians,” 
Nat. Geog. Mon., 1894, pp. 63-126. 
2W. M. Davis and J. W. Wood, Jr., “The Geographic Development of Northern 
New Jersey,” Proc. Bost. Soc. of Nat. Hist., Vol. XXIV (1889), pp. 365-423. 
