Why would you find more biogenic sediment on one side of the continent as opposed to the other side?

Biogenic (or biogenous) sediments are ubiquitous in marine environments; the main divisions are readily classified with reference to the amount of carbonate present and the depth of water at which they are found (shallow or deep). The dominant types are (in the order of abundance): deep-sea carbonates (calcareous ooze, foraminifer ooze, nannofossil ooze); deep-sea siliceous deposits (siliceous ooze, diatom ooze, radiolarian ooze); hemipelagic silica-rich deposits (at continental margins below upwelling regions); shelf carbonate deposits (reef and platform carbonates, dominated by coral and algal debris or by foraminifer and mollusk materials, depending on circumstances; reefal debris, lagoonal carbonate muds, etc.); and various types of anaerobic deposits (rich in organic matter and with or without opal or carbonate). Because deep sea covers most of the surface of the planet, the dominant biogenic deposits are deep-sea sediments, and their dominant ingredient is...

Explanation:

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.