Two-dimensional modeling of deltaic coastlines, under conditions of a steadily rising relative sea level and constant sediment input, suggests that the delta-front region will undergo an inevitable retreat after a relatively brief period of progradation. The retreat results from the progressive increase in the effective area of the delta's subaqueous slope, whereby the constant input of sediment does not allow a steady accretion of the slope. It may thus not be necessary to invoke any change in tectonic and/or paleoclimatic factors to explain the retreat phases of deltas recognized in the stratigraphic record. The Middle Jurassic Brent delta in the northern North Sea region is a possible example of the pattern of a delta front's quick advance followed by slow retreat predicted by the conceptual model.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.