Page 301 - Laboratory Manual in Physical Geology

FOLDED GEOLOGIC STRUCTURES (Ductile Deformation)

Basins are somewhat circular or Domes are somewhat circular or oval,
oval, with the youngest strata in with the oldest strata in the middle.
the middle. Think of a bowl. Think of an upside-down bowl.

34
36
28 29 30
34 30
29
26 30 24
26
Youngest
strata
Oldest Youngest
strata strata

Oldest
strata
E. BASIN F. DOME

2 Axial Axial plane
planes (blue)
(blue)

Overturned
45 45 limb

40 45
40

Anticlinal bend Synclinal bend

G. MONOCLINE H. OVERTURNED FOLD

Geologic Structures, Maps, and Block Diagrams ■ 271