12.6 Foreland Basins, Molasse
FOLD-THRUST BELT
FORE LAND BASIN
FOREBULGE
LEVEL
a
REGIONAL ISOST ATIC FLEXURE
OF THE LlTHOSPHERE
SUBSIDENCE OF BASEMENT SURFACE
\
11 1\1 1 :fr1" } ~-=U_lJc.l_L-FOtR-E-LA~N~D:'::B!::A""S-INs.--:W=E~STERN INrERIOR FORELAND REGION,
b
• ...J
w
CD
ICI)
:::>
a:
I
- - ' Id
I...J
W
CD
ICI)
:::>
a:
I
Ia:
w
>
w
CI)
a:
w
>
w
CI)
U .S.A. (U. CRETACEOUS)
110
LARAMIDE STRUCTURAL
z-BASIN_S
IV
I
I
Colorado\ _
!---RATON B.
I
300 km 3~ '
SUBSIDENCE IN E-W CROSS-SECTIONS
GENERALIZED STRATIGRAPHY IN
E·W CROSS-SECTION, 5 MONTANA
C
W
MAASTR.
70
CAMP.
80 Ma
SANTON.
CONIAC.
1-90
TURON.
CENOM.
e SUBSIDENCE HISTORY AT
SPECIFIC LOCATIONS
Ma
100
619