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Epigene, ep′i-jēn, adj. applied to the geological agents of change which affect chiefly the superficial position of the earth's crust, as the atmosphere, water, &c.—adjs.

Moreover, by its various movements, the sea occupies a prominent place among the epigene or superficial agents which produce geological changes on the surface of the globe.

From the time that any portion of the sea-floor appears above sea-level, it undergoes erosion by the various epigene agents.

But it must be remembered that, however much they may vary in activity and in the results which they effect, the epigene forces work without intermission, while the hypogene forces bring about the upheaval of land only after long intervals.

Epigene or Surface Action: The changes produced on the superficial parts of the earth, chiefly by the circulation of air and water set in motion by the sun’s heat.