eustacy

noun

1. (alt-of, alternative, uncountable, usually)Alternative spelling of eustasy.

   “Takai, F., and Tsuchi, R. 1963 The Quartenary: In "Geology of Japan," Univ. Calif. Press: 173–196 / […] From these facts, it is inferred that the main coastal terraces were probably formed due to glacial eustacy.”

   “The range in elevation suggests that the sea level was not constant during the formation of the caves and that the rise of land – perhaps counterbalanced periodically by glacial eustacies – was probably continuous.”