By N. P. James, R. N. Ginsburg
This primary IAS precise booklet includes the oral shows from a different symposium on pelagic sediments held in Zurich in 1973. the purpose of the symposium used to be to collect sea-borne researchers concerned with the Deep Sea Drilling undertaking and land-locked researchers learning historic sediments. while you are a member of the foreign organization of Sedimentologists, for getting info, please see: http://www.iasnet.org/publications/details.asp?code=SP3
Read Online or Download The Seaward Margin of the Belize Barrier and Atoll Reefs (IAS Special Publiction No. 3) PDF
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Extra info for The Seaward Margin of the Belize Barrier and Atoll Reefs (IAS Special Publiction No. 3)
Example text
3-11. 42 N. P . James and R. N. Ginsburg cliff face 1 0-12 m are often encountered when traversing along the wall. Rare, curving, subhorizontal fissures mark the upper limit of large pieces of the wall that have become detached and slumped. In one such slump where the fallen block was still in place, a slab about 100 m wide was observed to have dropped 1 0-15 m . On the eastern side of Glovers Reef (Site 7 ) and Queen Cays (Site 6), the relatively smooth wall becomes very rugged at a depth of 100-105 m with many large ledges, huge caverns and fissures .
Dis coidea more than 0·5 m across, growing as bushes, veils and vines are common. The most abundant Halimeda growth at this depth was observed off Queen Cays, where every solid substrate not buried by sand supports Halimeda. Along the barrier reef the depressions between hummocks or mounds are i nter connected and floored with sand. By these circuitous routes sand wanders down the 3. Deep barrier reef and fore-reef 37 slope i n a series of i rregular, often discontinuous st reams, which at any one time cover about half the surface.
In one such slump where the fallen block was still in place, a slab about 100 m wide was observed to have dropped 1 0-15 m . On the eastern side of Glovers Reef (Site 7 ) and Queen Cays (Site 6), the relatively smooth wall becomes very rugged at a depth of 100-105 m with many large ledges, huge caverns and fissures . Off Glovers Reef this change is marked by a huge ledge that extends out from the wall 8-1 0 m at a depth of 1 03 m. Off Queen Cays the slope is made up of steep vertical segments with many ledges and caves with intervening more gently dipping areas of perched sediment and talus.