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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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Barberton greenstone belt (1)
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Asia
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Far East
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China
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Bohaiwan Basin (3)
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Indonesia
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Sumatra (1)
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Japan
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Honshu
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Shizuoka Japan (1)
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Atlantic Ocean
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North Atlantic
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Canada
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Eastern Canada
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Western Canada
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British Columbia
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Caribbean region
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Europe
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Pacific Ocean
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West Pacific
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Santa Cruz Mountains (1)
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United States
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Texas
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commodities
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elements, isotopes
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carbon
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Tertiary
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Bowden Formation (1)
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upper Pliocene (1)
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Paleogene
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Dongying Formation (1)
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Annot Sandstone (1)
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metamorphic rocks
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turbidite (5)
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Primary terms
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absolute age (1)
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Africa
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Southern Africa
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Barberton greenstone belt (1)
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Asia
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Far East
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China
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Bohaiwan Basin (3)
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Indonesia
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Sumatra (1)
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Japan
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Honshu
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Shizuoka Japan (1)
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Atlantic Ocean
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North Atlantic
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Bay of Fundy (1)
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North Sea (1)
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Stikinia Terrane (1)
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Western Canada
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British Columbia
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Bowser Basin (1)
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carbon
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C-14 (1)
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Caribbean region
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West Indies
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Antilles
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Greater Antilles
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Jamaica (7)
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Lesser Antilles
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Cenozoic
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Quaternary
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upper Quaternary (1)
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Tertiary
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Neogene
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Miocene
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lower Miocene (1)
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Pliocene
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Bowden Formation (1)
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upper Pliocene (1)
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Paleogene
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Dongying Formation (1)
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Eocene
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Annot Sandstone (1)
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Oligocene (1)
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Shahejie Formation (1)
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Pacific Ocean
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West Pacific
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Paleozoic
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Permian
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petroleum
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Precambrian
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reefs (1)
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sedimentary rocks
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clastic rocks
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conglomerate (2)
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sedimentary structures
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biogenic structures
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sedimentation (3)
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sediments
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slope stability (1)
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structural analysis (1)
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tectonics
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United States
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Texas
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Wheeler County Texas (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (3)
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chemically precipitated rocks
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chert (1)
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clastic rocks
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shell beds (1)
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turbidite (5)
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Yallahs River
— A , Oblique aerial view, looking west, of Yallahs River mouth showing wav...
—Flood-plain deposits in cutbank of lower Yallahs River at measured section...
—Abandoned channel deposits in cutbank of lower Yallahs River near measured...
The morphology, geometry and kinematics of Judgement cliff rock avalanche, Blue Mountains, Jamaica, West Indies
Fan-Delta Sedimentology and Tectonic Setting—Yallahs Fan Delta, Southeast Jamaica
Oblique aerial view of Yallahs fan delta (January 1970) looking north (phot...
— A , Longitudinal-bar deposits of horizontally bedded gravelly sands of lo...
Sustainable river mining of aggregates in developing countries
Abstract Throughout the developing world, river sand and gravel is widely exploited as aggregate for construction. Sediment is often mined directly from the river channel and makes an important contribution to the national demand for aggregates. However, instream mining, if not carefully controlled, can cause significant damage to the river and its associated biota, and to the adjacent land, as well as creating conflict with other users of the river. The economic and environmental geology of river sand and gravel mining in developing countries is poorly known and there is little knowledge available to inform existing regulatory strategies. Research work on selected river systems in Jamaica and Costa Rica has generated a considerable amount of new information on resources and sediment budgets, on market and supply options, on the physical, biological and social impacts of extraction, and on best-practice legislative and mineral planning issues. A methodology has been developed for effective control of instream sand and gravel mining operations including a Code of Practice, which regulators can use for examining and reconciling the conflicting claims of sand and gravel extraction and the environment.