Abstract
Sedimentary sequences in marine basins develop in response to relative changes in sea level. Sequence development in individual basins may be satisfactorily explained by a combination of tectonic subsidence and long-period changes in global sea level. It has been argued, however, that apparently synchronous shoreline shifts in widely separated basins require actual fluctuations in the global sea level curve with a period of 1-10 m.y. We suggest a mechanism for producing synchronous relative sea level changes in widely separated and geologically independent basins without producing changes in all basins, and without requiring short-period fluctuations in the global sea level curve. The same mechanism can produce nonsynchronous, but related, shoreline shifts in separate bas ns while the rate of global sea level change remains constant.
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