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Free Content Lithification of Modern Marine Carbonate Sediments at Yellow Bank, Bahamas

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The mineralogy, chemistry, distribution of grain size, diagenesis, and ages of modern carbonates accumulating on the New Providence Platform, Bahamas, have been studied.

Lithification by aragonite cement is taking place beneath sixteen feet of sea water. These marine sediments have never been exposed to fresh water as determined by virtual absence of low-magnesium calcite and lack of recrystallization of aragonite and high-magnesium calcite. Depth of water and abundance of plant life appear to localize lithification at sites we have termed bioherms.

Significant vertical variations in facies have been found in the modern carbonates that overlie the recrystallized, biosparite, chemically dissolved Pleistocene bedrock. Silt- and clay-sized particles of unconsolidated modern carbonates rest unconformably on the biosparite and increase progressively in size toward the surface. Where modern lithified material is present, rarely is it found deeper than three feet below the water-sediment interface.

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Document Type: Research Article

Publication date: 1968-12-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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