Natural History
The delta lies in a river valley which began forming several million years ago. Many separate inland streams joined as they flowed southward across land which was once covered by the Gulf of Mexico. By the end of the last major ice age (approximately 18,000 years ago), when the sea level was much lower and Alabama's coastline was about 60 miles (97 km) south of its present location, the waterways of the delta valley extended much farther than their current-day southern termination at the head of Mobile Bay. As the ice age ended and global temperatures increased, sea levels began to rise again to their present-day level.
Read more about this topic: Mobile-Tensaw River Delta
Famous quotes containing the words natural history, natural and/or history:
“The use of natural history is to give us aid in supernatural history: the use of the outer creation, to give us language for the beings and changes of the inward creation.”
—Ralph Waldo Emerson (1803–1882)
“Parents fear lest the natural love of their children may fade away. What kind of nature is that which is subject to decay? Custom is a second nature which destroys the former. But what is nature? For is custom not natural? I am much afraid that nature is itself only a first custom, as custom is a second nature.”
—Blaise Pascal (1623–1662)
“History is the present. That’s why every generation writes it anew. But what most people think of as history is its end product, myth.”
—E.L. (Edgar Lawrence)