Abstract
The sediments and calcareous organisms on the outer reefal shelf of the Central Region of the Great Barrier Reef were collected and observed by SCUBA diving and research vessel techniques (including underwater television) to understand the production and processes of deposition of the sediment. The carbonate grains are mainly sand and gravel size and solely of skeletal origin. Over the whole area the major CaCO3 producers, in order of decreasing importance are: benthic foraminiferans (chiefly Operculina, Amphistegina, Marginopora, Alveolinella and Cycloclypeus), the calcareous green alga Halimeda, molluscs and corals. Coral abundance is high only close to reefs and submerged rocky substrates. Benthic foraminiferal sands dominate the inter-reef areas i.e. the bulk of the shelf, and Halimeda gravels form an outer shelf band between 60 and 100 m depths. Seven distinct facies are recognised after quantitative analyses of the sediments. These are: A. Shelf edge slope (>120 m depth); B. Shelf edge (with rocky outcrops); C. Outer shelf with high Halimeda (>40%); D. Inter-reef I; E. Inter-reef II ( 100 m depth but >2% pelagics); F. Lee-ward reef talus wedge (<2 km from sea level reefs); G. Lagoonal.
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References
Davies PJ, Kinsey DW (1977) Holocene reef growth-One Tree Island, Great Barrier Reef. Mar Geol 24:MI-MII
Flood PG (1974) Sand movements on Heron Island — a vegetated sand cay, Great Barrier Reef Province, Australia. Proc 2nd Int Coral Reef Symp 2:387–394
Flood PG (1977) Coral cays of the Capricorn and Bunker Groups, Great Barrier Reef Province, Australia. Atoll Res Bull 195:1–7
Flood PG (1984) A geological guide to the Northern Great Barrier Reef. Australian Sedimentologists Group Field Guide Series No. 1. Geol Soc Austr (in press)
Flood PG, Jell JS (1977) The effect of cyclone David (January 1976) on the sediment distribution patterns of Heron Reef, Great Barrier Reef, Australia. Proc 3rd Int Coral Reef Symp 2:119–125
Flood PG, Orme GR (1977) A sedimentation model for platform reefs of the Great Barrier Reef, Australia. Proc 3rd Int Coral Reef Symp 2:111–117
Flood PG, Scoffin TP (1978) Reefal sediments of the northern Great Barrier Reef. Philos Trans R Soc London Ser A 291:55–71
Flood PG, Orme GR, Scoffin TP (1978) An analysis of the textural variability displayed by inter-reef sediments of the impure carbonate facies in the vicinity of the Howick Group. Philos Trans R Soc London Ser A 291:73–83
Folk RL (1972) Electron microscope reconnaissance of muds from the Great Barrier Reef area, Australia. Search 3:171–173
Hopley D (1982) The Geomorphology of the Great Barrier Reef Wiley and Sons, New York, 453 pp
Jell JS, Flood PG (1978) Guide to the geology of reefs of the Capricorn and Bunker Groups Great Barrier Reef Province, with special reference to Heron Reef. Pap Dept Geol Univ Old 8 (3):85 pp
Johnson DP, Searle DE, Hopley D (1982) Positive relief over buried post-glacial channels, Great Barrier Reef Province, Australia. Mar Geol 46:149–159
Maiklem WR (1967) Black and brown speckled foraminiferal sand from the southern part of the Great Barrier Reef. J Sediment Petrol 37:1023–1030
Maiklem WR (1968) Some hydraulic properties of bioclastic carbonate grains. Sedimentology 10:101–109
Maiklem WR (1970) Carbonate sediments in the Capricorn Reef Complex, Great Barrier Reef, Australia. J Sediment Petrol 40:55–80
Maxwell WGJ (1968) Atlas of the Great Barrier Reef. Elsevier, Amsterdam, 258 pp
Maxwell WGJ (1973) Sediments of the Great Barrier Reef Province. In: Jones OA, Endean R (eds) Biology and geology of coral reefs, I. Geology I:299–346
Maxwell WGJ, Swinchatt JP (1970) Great Barrier Reef: variation in a terrigenous-carbonate province. Geol Soc Am Bull 81:691–724
Maxwell WGJ, Day RW, Fleming PJG (1961) Carbonate sedimentation on the Heron Island Reef, Great Barrier Reef. J Sediment Petrol 31:215–230
Maxwell WGJ, Jell JS, McKellar RG (1964) Differentiation of carbonate sediments on the Heron Island Reef. J Sediment Petrol 34:294–308
Orme GR, Flood PG, Sargent GEC (1978) Sedimentation trends in the lee of outer (ribbon) reefs, Northern Region of the Great Barrier Reef province. Philos Trans R Soc London Ser A 291:85–99
Orme GR, Flood PG (1980) Sedimentation in the Great Barrier Reef Province, adjacent bays and estuaries. In: Henderson RA, Stevenson PJ (eds) The geology and geophysics of Northeastern Australia. Geological Society of Australia, Queensland Division, Brisbane, pp 419–434
Pickard GL (1977) The Great Barrier Reef. In: Pickard GL, Donguy JR, Henin C, Rougerie F (eds). A review of the physical oceanography of the Great Barrier Reef and western Coral Sea. Australia Inst Mar Sci Monogr Ser 2:1–59
Searle DE, Harvey N, Hopley D (1980) Preliminary results of continuous seismic profiling on the Great Barrier Reef province between 16°10′S and 19°20′S. Geol Surv Queensl Rep 23:32 pp
Tudhope AW (1983) Processes of lagoonal sedimentation and patch reef development, Davies Reef, Great Barrier Reef of Australia. Ph D thesis, University of Edinburgh, 288 pp
Tudhope AW (in prep) Sedimentation on Davies Reef, Great Barrier Reef, Australia
Tudhope AW, Scoffin TP (1984) The role of Callianassa bioturbation in the preservation of lagoon sediments, Davies Reef, Great Barrier Reef, Australia. J Sediment Petrol 54:1091–1096
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Scoffin, T.P., Tudhope, A.W. Sedimentary environments of the Central Region of the Great Barrier Reef of Australia. Coral Reefs 4, 81–93 (1985). https://doi.org/10.1007/BF00300866
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DOI: https://doi.org/10.1007/BF00300866