Noah's Flood and the Geologic Layers (was Noah's shallow sea)

Where'd you hear that? Here beneath my house there's perhaps a mile of limestone and dolostone, all seemingly of organic origin. Do you, simple, think it's more probable that all the various organisms that grew shells and tests to make all that died in a single year, or over a slightly longer time? How fast can a reef grow? Can you or Dr Brown provide some data on that rate?More than Uniformism can account for? Is that less than a year of Waltian limestone deposition?

You're proposing that this Flood picked up a couple of counties in Arizona, complete with sand dunes and gopher burrows, and moved it out into the middle of a sea before dropping it? And the dunes and burrows didn't notice it happening?

Okay ..... the present atmosphere weighs 5100 x 10^18 grams, a tenth of what Hunt claims our limestone weighs. Limestone, whether organically or inorganically produced, falls out of water due to yhe reaction
Ca(HCO3)2 --> CaCO3 + H2O + CO2
where CaCO3 is calcium carbonate = limestone. The amount of CO2, carbon dioxide, liberated in this process is 44% of the weight of limestone produced, by high-school chemical calculations. So that's 4.4 times as much CO2 as the entire weight of the atmosphere. And Dr Brown needs this to all form in a single year, with a boat full of critters and folks surviving through it. My calculations have this influx of CO2 reducing the air's oxygen content from 21% down to 3.9%, while raising the pressure to 79 psi (now 14.7).That would be a little tough to breathe, Simple. And as has been pointed out, "uniformism" accomodates this CO2 slug very nicely - plants convert it back to oxygen, if you give them enough time to grow and do so. They can't manage it in a single year, as witnessed by their inability to recycle fossil CO2 as fast as we put it into the atmosphere - and that's only on the order of 10^16 grams per year, not 10^22 - a millionth of what Walt needs to dispose of.[This message has been edited by Coragyps, 02-08-2004]

And since aragonite is thermodynamically unstable with respect to calcite, we expect it to do what over time? Class?{Abusing my admin power, I'll put the answer right here - Aragonite and Calcite are what's called polymorphs of CaCO₃. Same chemical composition, but different crystal structure. Aragonite recrystalizes to Calcite. - Adminnemooseus, posting for minnemooseus}[This message has been edited by Adminnemooseus, 02-08-2004]

I've mentioned El Capitan somewhere on one of these threads you've been on, simple. It's a mountain a couple of hundred miles from here. It has about 1600 vertical feet of limestone, formed almost completely of the skeletons of calcareous sponges, largely in the positions in which the grew. How long does it take, do you think, to grow a layer of sponges a half-kilometer thick, if each one grows a couple of centimeters tall, and takes a year or two to do so? And why are there no sponges alive today of the many species whose parts make up this mountain?