Stratigraphic architecture
in fluvial-deltaic systems are responsive to eustasy and tectonics. To assess
the role of each in stratigraphic heterogeneity, Rasmussen examines a complex Miocene incised valley fill system at
the margin of the North Sea. Study of outcrops and boreholes, and integration
with seismic data, reveal a marine-to-fluvial succession, with a shift from
braided to meandering fluvial style, interpreted to form a compound incised
valley fill. The results reveal that the valley fill is a result of both
eustatic change and tectonics, and that tectonics results in a different
morphology and distinct distribution of lithology than occurs in most eustasy-controlled
incised valleys.
Development of an incised-valley fill under the influence of tectonism and glacio-eustatic sea-level change: valley morphology, fluvial style, and lithology by Erik
S. Rasmussen
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