You may have noticed these same fences on almost all beaches, both here and in other parts of the world. The sand fences look thin and flimsy, but they’re actually serving a great purpose. The fence is made of wood slats that are deliberately spread apart. These openings allow for sand to be blown into the fence, but then accumulate naturally in that area. These simple fences help restore sand dunes in populated areas and prevent future erosion. Gulf State Park is currently undergoing a $135 million dollar project to install these fences, which will be paid for by the 2010 BP oil spill funds.
The dune pictured below stood around 8-9 feet high. Much of Florida’s panhandle used to be bordered by similar dunes. As you move away from the beach, you can see ancient dunes that resemble hills, growing pine and oak trees. Though these have become rare in Florida (due to development), in recent years residents have realized that dunes provide an extremely effective and cost efficient barrier against erosion and storms. Now, dune restoration has become a popular cause in many coastal communities.
You may have noticed that beaches on the gulf are well known for this ultra-white, sugary appearance. This is because the sand is almost entirely made of quartz. Ironically, quartz is not a naturally occurring part of the Gulf Coast -- so how did all this white sand get there?
These quartz particles are originally from the quartz rock in the Appalachian Mountains. At the end of the last Ice Age when the world temperatures began warming and the ice caps began melting, large rivers washed down the mountains and carried the sand to the ocean. The quartz sand that is in the Gulf of Mexico can be traced up the Apalachicola River, which rises in the Appalachians.
Posts are a combination of my own research, visits, and conversations, plus various information found around the web. I try to provide sources, but if you have specific questions, feel free to ask!