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John
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It changes, there is no one overwhelming effect.

At some times plats have dominated at others ocean sediments have dominated. Position of continents, global temperature, sea level, and evolution of lifeforms all effect it.

Also you have a problem that those time periods are time PERIODS, the Proterozoic is 5 times longer than the phanerozoic. It had higher AND lower levels.

https://rock.geosociety.org/net/gsatoday/archive/9/11/pdf/i1052-5173-9-11-1.pdf

https://earthscience.rice.edu/wp-content/uploads/2017/08/Berner_nature-2003-1.pdf

https://www.sciencedirect.com/science/article/pii/S1342937X18302818

John
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