original_query: What caused the worldwide oscillatory increases in ocean floor spreading rates from 0-85 Ma?
query: What caused the worldwide oscillatory increases in ocean floor spreading rates around 110-85 Ma?
answer: Around 110-85 Ma, worldwide oscillatory increases in ocean floor spreading rates occurred.  This increase in basalt injection into the ocean displaced water, causing sea level rise (the Cenomanian transgression).  Increased magma also raised CO₂ levels and global temperatures.