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BULLETIN OF MARINE SCIENCE, 81(3): 371391, 2007 371Bulletin of Marine Science
 

Summary: BULLETIN OF MARINE SCIENCE, 81(3): 371391, 2007
371Bulletin of Marine Science
2007 Rosenstiel School of Marine and Atmospheric Science
DEEp-SEA SCLERACTINIAN CORAL AgE AND
DEpTh DISTRIBUTIONS IN ThE NORThWEST
ATLANTIC FOR ThE LAST 225,000 yEARS
Laura F. Robinson, Jess F. Adkins, Daniel S. Scheirer,
Diego P. Fernandez, Alexander Gagnon, and Rhian G. Waller
ABSTRACT
Deep-sea corals have grown for over 200,000 yrs on the New England Seamounts
in the northwest Atlantic, and this paper descries their distriution oth with re-his paper descries their distriution oth with re-
spect to depth and time. Many thousands of fossil scleractinian corals were col-
lected on a series of cruises from 20032005; y contrast, live ones were scarce. On
these seamounts, the depth distriution of fossil Desmophyllum dianthus (Esper,
1794) is markedly different to that of the colonial scleractinian corals, extending 750
m deeper in the water column to a distinct cut-off at 2500 m. This cut-off is likely
to e controlled y the maximum depth of a notch-shaped feature in the seamount
morphology. The ages of D. dianthus corals as determined y U-series measure-
ments range from modern to older than 200,000 yrs. The age distriution is not
constant over time, and most corals have ages from the last glacial period. Within

  

Source: Adkins, Jess F. - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collections: Environmental Sciences and Ecology; Geosciences