peabrain wrote:Corals thrived in acidic waters when CO2 exceeded 2000 ppm . . . at the time ancient petroleum carbonate reefs were laid down.
Wrong again, ye of little brain matter. You just make this shit up, don't you.
The evolutionary history of modern corals is divisible into three geological intervals (1) the Paleogene, when the survivors of end-Cretaceous and Late Palaeocene extinctions proliferated into a diverse cosmopolitan fauna, (2) the Miocene, when this fauna became subdivided into the broad biogeographic provinces we have today and pre-cursors of most extant species evolved, and (3) the Plio-Pleistocene to present, when the world went into full glacial mode and modern distribution patterns emerged.
The first organisms that might be called scleractinians are known from Paleozoic fossils from China and Scotland, but the earliest proliferation of organisms that were clearly ancestral Scleractinia are Middle Triassic and consisted of at least seven, but possibly nine, suborders. These corals did not build reefs; they were small solitary or phaceloid organisms of the shallow Tethys of southern Europe and Indo-China.
Triassic corals were not the ecological equivalents of modern corals; corallites were large and poorly integrated so that phacelloid growth forms (where branches are composed of individual corallites) were dominant. Reconstruction of a Late Triassic coral community. The taxa portrayed may not have occurred in the same geographic region at the same time. The dominant growth forms of the corals are massive and phacelloid. There were no intricately branching corals such are found today and most corals had large corallites. Reconstruction of a Late Triassic coral community. The taxa portrayed may not have occurred in the same geographic region at the same time. The dominant growth forms of the corals are massive and phacelloid. There were no intricately branching corals such are found today and most corals had large corallites.
There was a 5-8 million year hiatus between the collapse of Triassic reef development and the onset of Jurassic reefs, a time of origin of many new scleractinian families.
linkThe first 'corals' appeared in the mid-Triassic. During the Triassic-Jurassic extinction event, a time of high ocean acidity and atmospheric CO2, reef development collapsed for millions of years, and resumed again with new coral families in the Jurassic once CO2 came back down.
The precursors of the corals we have today evolved in the mid-Miocene and have NEVER BEFORE seen high ocean acidity or CO2 levels higher than current levels.
The skeletons of corals are made of calcium carbonate which dissolves in conditions of high acidity.
And by the way, carbonate reefs are a classification of a sediment type consisting of large particles. It is not a reference to coral reefs.
You should realize that any time you make something up and post it, I'll be following right behind with the truth and make you look foolish. So do yourself a favor. If you don't know it, don't post it. It wouldn't hurt if you did a little research at non-denier websites and know the truth.
"For my part, whatever anguish of spirit it may cost, I am willing to know the whole truth; to know the worst and provide for it." - Patrick Henry
The level of injustice and wrong you endure is directly determined by how much you quietly submit to. Even to the point of extinction.