Great Marathon Basin
category : Natural Attractions
The Great Marathon Basin is a widely known geologic area noted for extensive surface outcroppings of varied rocks and minerals, popular with professional geologists and amateur rockhounds. A 191.2-mile strip on the American shore of the Rio Grande in the Chihuahuan Desert protects the river. It begins in Big Bend National Park and continues downstream to the Terrell-Val Verde county line.
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