The Ice Age ocean shoreline of the Texas gulf coast was about two hundred miles south of the current coastline, so Galveston Bay was probably a basin containing a swamp when what now are called bayous were rivers which flowed into the swampy basin then on to the sea. It would be interesting to know what was the nature of the outflow below the huge basin, whether one broad shallow river or braided streams similar to those of the Nile’s delta (but with much less flow).
