British Geological Survey
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The GEOSYNTH project provides (on CD-ROM) a synthesis in GIS and multimedia of the geology and sedimentology of the Dover Strait and its coastal limits.
A product of a rapid study by the British Geological Survey (BGS) for JNCC to provide data as GIS layers to be incorporated into the UKSeaMap project. To complete this work, 13 of the 15 categories of FOLK classification in DigSBS250 were combined using SQL and the merge command to create 4 out of the 5 classes required for the UKSeaMap project. The remaining 2 Folk categories, ?muddy sands? and ?slightly gravely muddy sands?, were split at the 8:2 sand: mud ratio into either the ?sand and muddy sand? or ?mud and sandy mud? classes. Polygon boundaries were manually edited based on individual BGS sample locations. Rock categories within DigSBS250 were also classified as rock in UKSeaMap. Previous datasets (CR/01/238) on potential reefs were then added, replacing DigSBS at these locations. The CLIP command was used to ?cut? into the underlying DigSBS dataset to minimise topological errors.
Minor modification to BGS derived seabed habitats.
Locations of all known pockmark areas around the UK beyond 12nm. The bulk of these have been mapped by BGS from seismic surveys. Provided by BGS as part of the contract for the Offshore Natura 2000 Project.
The objective of the Mapping INshore Coral Habitats or MINCH project was to assess the current distribution and status of cold-water coral habitats to the east of the Island of Mingulay. A series of additional areas were examined in the Sound of Rum and to the west of Skye. Reefs formed by the cold-water coral Lophelia pertusa were identified in the surveys to the east of Mingulay where they formed characteristic seabed mounds. These mounds were clearly seen on the multibeam bathymetry and backscatter data records. The backscatter also revealed intriguing 'trails' extending downstream from some of these mounds. Their composition and cause are currently unknown. This information was summarised in the MINCH Geographic Information System (GIS) project. While there are some indications that small colonies of L. pertusa are present at each for the study areas, clear evidence for significant reef development was only found at Mingulay. We propose that this area be referred to as the Mingulay Reef Complex. Further work is now needed to characterise the diversity of the reef-associated community, record the hydrodynamic regime and complete detailed visual surveys of the reef habitat.