[Coral-List] wikipedia, holocene temperatures

Ulf Erlingsson ceo at lindorm.com
Fri May 30 10:50:52 EDT 2014


Bill, you can't just invent sea level changes to explain your data. The global sea level made a sudden rise around 8200 years ago (due to the drainage of the glacial lake over Canada) and has then only changed slowly, transgression or regression depends on where on Earth you look. 

Ulf Erlingsson


On 2014-05-29, at 10:45, Bill Raymond wrote:

> 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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