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Deep-water antipatharians: Proxies of environmental change

January 1, 2006

Deep-water (307-697 m) antipatharian (black coral) specimens were collected from the southeastern continental slope of the United States and the north-central Gulf of Mexico. The sclerochronology of the specimens indicates that skeletal growth takes place by formation of concentric coeval layers. We used 210Pb to estimate radial growth rate of two specimens, and to establish that they were several centuries old. Bands were delaminated in KOH and analyzed for carbon and nitrogen stable isotopes. Carbon values ranged from -16.4??? to -15.7???; oldest specimen displayed the largest range in values. Nitrogen values ranged from 7.7??? to 8.6???. Two specimens from the same location and depth had similar 15N signatures, indicating good reproducibility between specimens. ?? 2006 Geological Society of America.

Publication Year 2006
Title Deep-water antipatharians: Proxies of environmental change
DOI 10.1130/G22685.1
Authors B. Williams, Michael J. Risk, Steve W. Ross, K. J. Sulak
Publication Type Article
Publication Subtype Journal Article
Series Title Geology
Index ID 70028404
Record Source USGS Publications Warehouse