Message forwarded for Peter Connolly
Amy and everyone,
The earliest formal definition of the term en-echelon (as well as many other
bits of our jargon) I have yet found was presented in a compendium of such
things by Biddle and Christie-Blick*
They defined en-echelon as:
En echelon:-
(1) A stepped arrangement of relatively short, consistently overlapping or
underlapping structural elements such as faults or folds that are
approximately parallel to each other but oblique to the linear or
relatively narrow zone in which they occur. En echelon arrangements can
occur in both map view and cross section.
(2) Any stepped arrangement of two or more overlapping or underlapping
structural elements such as faults or folds that are approximately parallel
to each other and to the zone in which they occur, without reference to
whether the sense of overstep is consistent or inconsistent. See oblique,
relay pattern.
*Christie-Blick, N., & Biddle, K. T., 1985, Deformation and basin formation
along strike-slip faults., in: Biddle; K. T.; and Christie-Blick. N.; eds.;
Strike-Slip Deformation; Basin Formation; and Sedimentation. Society of
Economic Palaeontologists and Mineralogists Special Publication., 37, 1-34
I hope this helps
Peter
Dr Peter Connolly
____________________________________
Laboratoire de Géophysique et Tectonique,
Case 060
Université Montpellier II
Place Eugene Bataillon
34095 Montpellier
Cedex 5
FRANCE
tel. +33(0)467 144690
fax. +33(0)467 523908
email [log in to unmask]
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
John Whalley
Lecturer in Structural Geology and Computer Applications in Geology
List owner - geo-tectonics
Tel +44 23 9284 2247 Fax +44 23 9284 2244
School of Earth, Environmental and Physical Science
University of Portsmouth
Portsmouth, PO1 3QL, UK Email- [log in to unmask]
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|