Black Mesa State Park, established in 1959, is in the Western tip of Oklahoma's Panhandle and consists of 549 acres of land and Lake Carl Etling - a 200 acre lake. The Black Mesa itself is northwest of the park proper and is also a state park area. Black Mesa's history began millions of years ago when pre-historic beasts like the 65 foot-long brontosaurus, who skeleton was discovered here, roamed the area. Petrified logs, displayed in the park, are remnants of another era, also millions of years past. Primitive man entered the picture, according to scientific theory, some 10,000 to 12,000 years ago, and cliff dwellers are thought to have lived in the caves near Black Mesa 1500 to 2000 years ago. Coronado and his Spanish exploring expedition crossed the area. An inscription "Coronatto, 1541, " in old Castillian style and spelling, is carved upon a canyon wall. Its eroded condition upholds its authenticity. Remnants of pumpkin vines and ears of corn support a theory that this was one of the earliest agricultural areas in the United States, cultivated during the time of Christ. Some experts believe the petrified logs found in abundance may be parent trees to the present giant Redwoods of California.