[Coral-List] wikipedia, holocene temperatures

[Bill Raymond]

May I suggest sea level dropped around 6000 years ago (4500 years ago according to the elkhorn off Ft Lauderdale (3rd reef) killing the reef, then rose to a depth too great for elkhorn. The first part I say from what I saw off Pompano Beach, the second is pure speculation. 


On Wednesday, May 28, 2014 4:16 PM, Eugene Shinn <eugeneshinn at mail.usf.edu> wrote:
  


Yes Ian, Geologists are well aquainted with that Holocene temperature 
curve.  It  explains why Acropora grew well at the Flower Gardens 
Sanctuary about 6 thousand years ago.  Note that there is a downward 
spike at around 4,500 years ago. It may explain the 500 hundred year 
absence of staghorn coral in the Keys that we documented in our Coral 
Reefs article some time ago. We are still trying to figure out why more 
than 90 percent of the outer reefs in the keys failed to accumulate much 
over 3 ft during the 6,000 years the area has been underwater. The only 
thick accumulations are the major reefs that have reached sea level and 
usually are marked/named and/or have lighthouses on them. The thickest 
Holocene reefs are landward of the outer reef line. Gene

http://en.wikipedia.org/wiki/File:Holocene_Temperature_Variations.png

Gene

-- 


No Rocks, No Water, No Ecosystem (EAS)
------------------------------------ -----------------------------------
E. A. Shinn, Courtesy Professor
University of South Florida
College of Marine Science Room 221A
140 Seventh Avenue South
St. Petersburg, FL 33701
<eugeneshinn at mail.usf.edu>
Tel 727 553-1158
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