Incised Valleys
Trinity Valley in Galveston Bay

This profile across the Trinity River incised valley in Galveston Bay is based on combined seismic and platform boring data. It is typical of incised valleys in which a broad, incised meander is formed during the initial fall in sea level with fluvial terraces along the flanks of the valley (Deweyville Terraces). During the maximum lowstand the deeper incision is cut and lowstand fluvial deposition occurs. Most of the valley fill in this location, including fluvial deposits, were deposited during the transgression.

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