The Quartz Mountains are an extension of the Wichita Mountains in the far southwestern part of the state of Oklahoma. According to the Encyclopedia of Oklahoma History and Culture, the range was originally formed about 550 million years ago as a "failed continental rift".
According to the Encyclopedia of Oklahoma History and Culture, the Quartz Mountains, which are a continuation of the Wichita Mountains in the far southwestern region of Oklahoma, were formed about 550 million years ago as a failed continental rift.