“Broken Limestone” zones occur in the northeast and southwest areas of the Grasberg Pit. These broken limestone zones are generally trending parallel to the regional fault structures. The broken Limestone zones are controlled by regional and major fault structures, as well as pebble dike, karst and dissolution breccia occurrences. In the northeast area the broken limestone zone is complicated by the occurrence...
Sunday, November 14, 2010
GEOLOGICAL REVIEW OF BROKEN LIMESTONE SURROUNDING THE CUAU GRASBERG OPEN PIT – Papua, Indonesia
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Wave-Dominated Deltas
Wave-Dominated Deltas Geometry: 1.More lobateand have smooth, arcuateto sharp margins. 2.Longshoredrift may rework sediment along coastline. 3.Lobes strung out parallel to shoreline. Controls on the Geometry: 1.substrate gradient 2.wave energy vs. tidal energy 3.sediment supply vs. accommodation volume: supply-dominated areas produce allochthonousshelves characterized by more rapid sedimentation and thick...
What is a delta?
A delta, as defined by the USGS (U.S. Geological Survey), is the fan-shaped area at the mouth, or lower end, of a river, formed by eroded material that has been carried downstream and dropped in quantities that can not be carried off by tides or currents. Boggs defines a delta as any deposit, subaerialor subaqueous, formed by fluvial sediments that build into a standing body of water....
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