By Martin Hovland
Because of in depth ocean backside surveys, normally for the aim of constructing oil and fuel assets, scientists comprehend that deep-water corals shape wide reefs and significant carbonate mounds within the chilly waters of the entire significant oceans.This e-book, written by way of Hovland (Statoil, Norway), a marine geology specialist, is of substantial curiosity as a result of its many coloured photos and drawings that illustrate the destinations and natural range of the reefs and piles. these within the different world-wide oceans seem to be comparable. The textual content is easily written and the writer attracts recognition to the necessity for conservation, essentially to guard the reefs from harm through deep-water trawling. helpful as supplemental examining for sessions on marine biology.Summing Up: hugely urged. educational collections, upper-level undergraduates, graduate scholars, researchers, and college.
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Additional info for Deep-Water Coral Reefs: Unique Biodiversity Hot-Spots
Perhaps the best analogues to the Norwegian Lophelia reefs are the spectacular Devonian (380-million-year-old) Saharan fossil reefs. , support for the hydraulic formation model). The best analogy for the modern giant carbonate mounds oﬀ Ireland and Mauritania are perhaps the Kess-Kess Mounds in Morocco. These have also been suggested as seep-related. ’’ My own conclusion is that we really do not know how and why ancient structures or modern ones formed. Thus, there is a lot of future research to be carried out on the modern occurrences.
Groundwater ﬂow, seepage, and springs). The microbialites were described by Laval et al. (2000) as being up to 3 m high, occurring along the lakesides in clusters aligned roughly perpendicular to the shoreline. They generally occur at three depths: shallow 176 Ancient and modern analogues [Ch. 7 ($10 m), intermediate ($20 m), and deep (>30 m). The shallow ones range in height from several centimetres to a few decimetres and comprise interconnected clusters of discrete round aggregates of calcite grains covered by photosynthetic microbial communities and their calciﬁed remains.
Similar mounds have also been found farther to the west, in the Mader Basin, Eastern Anti-Atlas, Morocco (Kaufmann, 1998). These are the Kess Kess fossil mud mounds. Normally, fossil seep-related structures are only found underground, as buried features, seen on seismic records, and penetrated by drilling. But, fortunately, some rare, spectacular cases are exposed in arid and vegetation-free zones on the surface, as described below. 2 Kess-Kess formations, Morocco Up to 55 m high, conical fossil carbonate formations occur in the eastern Anti-Atlas mountains, southern Morocco (Belka, 1998).