Why do seashells contain more calcium carbonate than limestone?

After a build up of salt and limestone precipitation, "The Flood" caused subterranean water to sweep the Limestone to the earths' surface. Limestone accounts for 10-15 percent of the sedimentary rock. Remarkably earths' limestone holds a thousand times more calcium and carbon than todays atmosphere, oceans, coal, oil, and living matter combined.

Visual examination will show that few of the grains are actually ground up seashells and corals as many believe. But, because limestone precipitates along the coast, it is possible that certain seashells would contain high levels of calcium carbonate. LOOK at this equation...... H2O(l)+CO2(aq)+CaCO3(s) Ca 2+ (aq) +2HCO3 1- (aq) You can see how easily the carbonic acid being unstable is converted back to the original reactants.

SEASHELLS were ade by biological induces precipitation of calcium carbonate hich leads to the high content of calcium, But Limestone, seashells, chalk and marble all consist of different types of calcium ... more.

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