Question

Explain the difference between a sea-level transgression and regression.

Answer 1

Marine regression means that, submerged sea floor are exposed. It exposes the sea bottom while the transgression may result into flooding. A sea level transgression or marine transgression means when the water level or sea level arises in land, it also means that the sea level will move towards higher land. 

Answer 2

Transgression is when the sea-level rises, pushing the coast line inland. Regression is the sea-level falling, pushing the coastline out towards the ocean.