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has
just completed a marathon installation and training trip which, on his
return, will have taken him around the world. The first system
was delivered to The Department of Environmental Sciences at the University
of Technology, Sydney (http://www.science.uts.edu.au).
The next port of call was Gainesville in Florida where the Department of
Geology at the (http://www.ufl.edu/)
University of Florida has taken delivery of MSCL and GEOSCAN digital imaging
systems. Finally Peter visited the Coastal Studies Institute at Louisiana
State University (http://www.csi.lsu.edu)
who have also purchased a system. The system at LSU includes the new
non-contact resistivity sensor (http://www.geotek.co.uk/ncr.html). |
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A
new version of the GEOTEK MSCL software has just been released (the current
version is 6.0). This includes some new image handling routines that
provide a significant increase in performance over previous versions.
For more details on any of the
above please contact GEOTEK at
(mailto:info@geotek.co.uk)
or visit:
http://www.geotek.co.uk
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New
discovery of coral reefs in the Norwegian Sea using multibeam bathymetry
T. Thorsnes, Geological
Survey of Norway, Jan Helge Fossa and Thomas Noji, Institute of Marine
Research, Norway
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New
coral reefs have been found in the Norwegian Sea, using a combination of
multibeam bathymetry technology and video photography.
The coral reefs
are located on the flanks of a 100 meters high submarine moraine ridge
100 km west of the coast in Mid-Norway. Using the multibeam data collected
by the Norwegian Hydrographic Service, the possible existence of coral
reefs on the flanks was indicated by scientists from the Geological Survey
of Norway. Upto 40 m high tooth-shaped structures emerged when the multibeam
data were used for construction of 3D terrain models, and were found to
be incompatible with normal geological processes. The hypothesis that these
were in fact undiscovered coral mounds was put forward. In Summer 2000,
a ship from the Institute of Marine Research in Bergen surveyed the structures
with towed video equipment, and the vidoegraphs confirmed the presence
of corals on the structures |
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Click
here
to see
A - morphological overview map
of the Mid-Norwegian shelf between 63° and 68°N. SB - shelf break
at 400-500 m water depth. B - 3-dimensional view of the Horseshoe
Ridge - a 100 m high and 10 km wide moraine ridge at 300 m water depth.
C
- low angle 3D-view, enhancing the coral reefs on the southern flank of
the ridge (far right in B). D - screen dump from ErMapper
(the image processing system used) showing the coordinates of one of potential
coral mounds. E - video photographs from the location in D
of corals, verifying the interpretations from the detailed bathymetry. |
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Go
to page 3 (Illustrations of coral reefs)