Dear Joanie,
I use the terms "passive and active folding" for describing thrust-related
folding mechanisms, looking at the kinematic behaviour of the hangingwall.
In this sense my interpretation is quite liberal, similarly to what Mark
Fisher wrote. Passive folds are produced by the passive translation of the
HW above a non-planar fault (i.e. fault-bend folding). The shape of the fold
is basically dictated by the shape of the fault. Active folds involve an
active role of the HW mechanical stratigraphy, strain rate...,... in
determining the fold shape (Decollement folding and Fault-propagation
folding). In active folding you can have different fold shapes developed
above the same fault shape.
This is just my liberal interpretation.
Best wishes,
Fabrizio
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Fabrizio Storti
Dipartimento di Scienze Geologiche,
Universita' degli Studi "Roma Tre"
Largo S. L. Murialdo 1,
00146 Roma, Italy
Tel. +39 0654888033
Fax: +39 0654888201
E-mail: [log in to unmask]
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