# Average Aragonite:Calcite ratio in biogenic CaCO3 in the oceans

I wonder what the average ratio between aragonite and calcite is during the precipitation of biogenic calcium carbonate in seawater. I know some species are aragonite-favouring and some perfer using calcite. I also know that aragonite is about 50% more soluble than calcite, and therefore less common.

If any of you would know a (coarse) average between these two (with references if possible)?