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( ) Piston or plate collapse
a
( ) Piecemeal
b
Topographic rim
Chaotic
Landslide
breccia
Structural rim
Funnel
()Trapdoor
c
()Downsag
d
Extension
Figure 5.9 Four end-member mechanisms of caldera collapse. (a) Piston or plate collapse. (b) Piecemeal. (c) Trapdoor.
(d) Downsag.
Source: After Cole et al. (2005)
 
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