DINOSAUR TRACKS IN HAMILTON COUNTY, TEXAS 355 



of the rock was covered with mud or sun-baked soil to a depth 

 varying from several inches to as many feet. It was therefore 

 impossible to clean off the rock over more than limited areas in 

 the short time available. 



Fig. I. — Sketch map of a portion of Central Texas showing outcrop of Glen Rose 

 Formation. (After R. T. Hill.) i, location of Glen Rose tracks. 2, location of 

 Hamilton County tracks. 



A spot was selected at random, and the soil was removed from a 

 space about four feet square. Three well-defined tracks were exposed 

 within this space, and four others were less clearly recognizable 

 (Fig. 3). At six other spots the soil and gravel were removed 



