Many thanks to Bill for a thoughtful contribution that raises many
useful points. This will have to be a brief response as I'm about to
go out for the evening but there is one point to make straight away. The
is a little used aspect of the JISCmail system - a filestore. It has
been little used largely because in previous versions of the software it
wasn't exactly user friendly. I will investigate the present version, it
might provide exactly the repository that Bill is advocating.
John
John S Whalley, Geoscience Programme Manager
List owner - geo-tectonics
(http://www.jiscmail.ac.uk/lists/geo-tectonics.html)
Tel +44 23 9284 2247 Fax +44 23 9284
2244
School of Earth and Environmental Sciences
University of Portsmouth
Portsmouth, PO1 3QL, UK Email- [log in to unmask]
>>> wrc <[log in to unmask]> 10/03/2009 18:47 >>>
All the contributions to the topic of fold nappes were indeed
very interesting. However, they would have been even more instructive
if they had been linked to images that would have allowed us more easily
to visualize the geographic and geological context of the offered
observations. Brian Walton's interesting comments, to take one example
of several, on the Krakvatn-Rebenfjell fold nappe would be more
comprehensible if we could see a map of the structure; and although Alan
Boyle generously provides references, if you don't have online
permissions provided by a University or company, it can take an all-day
trek to the library to find them.
In this context John Dewey's suggestion that geo-questions such
as the nappe problem could be addressed by multi-input through websites
like this discussion list, rather than through "review, assessment and
arid "paperwork"", might be greatly facilitated if comments containing
reference to places and maps were accompanied by links to a site
containing Google Earth kml (kmz) files relevant to the area (and/'or at
least' a link to a pdf of a relevant paper as per Douwe van Hinsbergen's
contribution). Given that Google Earth should be a well-used item in
the tool kit of all structural geologists, it should be quite easy for
anyone of us to add placemarks and image overlays to a GE ground image
at any scale. (One then also gets the advantage of 3-D geological map
drapes; the ability to discern dip directions and relative angles;
compare map layer interpretations; and create links to references, pdfs,
reviews, comments, updates, photographs, etc.) Going the extra mile,
the images can also easily be annotated to allow personal input.
Anyone not familiar with the practice of creating and accessing kml
files can download a file that can be opened in GE from the following
site:
http://instruct.uwo.ca/earth-sci/fieldlog/Google_Earth/ , e.g.
Ireland.kmz , and should they need assistance can contact me at
[log in to unmask] Note the potential core complexes that show up on
the new images (Chew, and Cooper, 2008) of the Tyrone Dalradian inlier.
One problem with this suggestion is that although it is easy to
create a kml file on a personal computer running GE, you will still need
to store your kml AND the map images refered to by the kml on a server
that can be accessed by the general public, whether such a site is
provided by your University (as in the above case), or made available
through your service provider or even your computer company, e.g. ASUS
Eee to name just one.
A central server would be useful - any volunteers? - but even
without a central server, a site with an index of individual servers
populated by kml files would be very useful - perhaps even more so than
the OneGeology site, because the geological devil is usually in the
details at the outcrop level of a high-resolution GE image. Perhaps
the T&G list could host such an index ordered by Country and Structural
Province?
Hope this is of interest!
Bill Churc
h
