Quaternary tectonic stability of the Bahamian archipelago: evidence from fossil coral reefs and flank margin caves

1995 ◽  
Vol 14 (2) ◽  
pp. 145-153 ◽  
Author(s):  
James L. Carew ◽  
John E. Mylroie
1928 ◽  
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pp. 134 ◽  
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Facies ◽  
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Vol 18 (1) ◽  
pp. 219-229 ◽  
Author(s):  
Ibrahim A. Al-Rifaiy ◽  
Omar H. Cherif
Keyword(s):  

PAGES news ◽  
2009 ◽  
Vol 17 (2) ◽  
pp. 54-56 ◽  
Author(s):  
Morten B Andersen ◽  
CD Gallup ◽  
D Scholz ◽  
CH Stirling ◽  
WG Thompson
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2018 ◽  
Vol 191 ◽  
pp. 41-56 ◽  
Author(s):  
N. Bar ◽  
A. Agnon ◽  
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B. Lazar ◽  
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...  

Geosciences ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 268 ◽  
Author(s):  
Erik Larson ◽  
John Mylroie

The majority of limestone islands are made of eogenetic carbonate rock, with intrinsic high porosity and permeability. The freshwater lenses of small islands are dominated by diffuse flow regimes as the island perimeter is everywhere close to the meteoric catchment of the island interior. This flow regime produces flank margin caves at the lens margin, where dissolution is enhanced by mixing corrosion, superposition of organic decay horizons and higher flow velocities as the lens thins. The lens interior develops touching-vug flow systems that result in enhanced permeability and lens thinning over time. As islands become larger, the area (meteoric catchment) goes up by the square, but the island perimeter (discharge zone) goes up linearly; diffuse flow becomes inefficient; conduit flow develops to produce traditional epigenic cave systems that discharge the freshwater lens by specific turbulent flow routes, which in turn are fed by diffuse flow in the island interior. Locally, diffuse flow to the island perimeter continues in coastal proximal areas between major conduit flow routes to produce flank margin caves. The Bahamian Archipelago represents a case history in which tectonics is limited, the rocks are entirely eogenetic and the diffuse to conduit flow transition is demonstrated.


1894 ◽  
Vol 1 (1) ◽  
pp. 1-10 ◽  
Author(s):  
M.M. Ogilvie

At the meeting of the British Association in Nottingham,inAugust of last year, a joint discussion on “Coral Reefs” was held by the sections of Zoology and Geology. Prof. Sollas,inopening the discussion, referred to the “ Dolomites of South Tyrol” as a country affording brilliant examples of Fossil Coral Reefs. He demonstrated this by sections taken from the wellknown work of Mojsisovics, and showed several photographs of some of the more imposing dolomite mountains—Schlern, Langkofl, and Sella—which had been explained as reefs of Triassic age. in the course of the discussion, Dr. Hickson said he believed there were no corals in these so-called fossil reefs. Dr. Rothpletz corrected this statement, saying briefly that there were corals in the dolomite and limestone rock, along with other groups of marine animals, but that many of the sections shown by Prof. Sollas were incorrect. Prof. Bonney emphasized the ample evidence of Coral life in many parts of the district which he had visited.


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