Hi Barry,
Regarding your question if strike of regional foliation in metamorphic
rocks can trace a former continental contact. I think this is certainly the
case in younger orogenic belts where strike of regional foliation parallels
that of the orogen (Northern NA Cordillera). And if you have other proof
for a suture, such as isotope data, etc. But if you go into older terrains
with multiple metamorphism and deformation, development of large
strike-slip faults, shear zones, etc., you would need extra independent
evidence. Regional trend of foliation alone in an Archaean schist would not
convince me.
Ciao,
Jochen
>How Now Everyone
>
>Does the strike of regional foliation in metamorphic rocks mimic past
>continental contact?
>--
>;-)
>Barry Bowman
***************************************************************************
Dr. Jochen Mezger
Postdoctoral Fellow
Johannes Gutenberg-University Mainz Tel.: 49-(0)6131-3924767
Institut fuer Geowissenschaften Fax.: 49-(0)6131-3923863
Tectonophysics Group
Becherweg 21 Email: [log in to unmask]
55099 Mainz
GERMANY
============================================================
"We're all recycled history machines,
cavemen in faded blue jeans." Jimmy Buffett
****************************************************************************
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|