Robert W. Gregory

• Mantle-Derived Breccia Pipes in the Southern Green River Basin of Wyoming, USA
• Rare Earth Elements in Wyoming
• Diamond Exploration Potential of the Wyoming Craton, Western United States, USA
• Geology and Geochemistry of the Quaking Asp Mountain and Black Butte silicified zones, Green River Basin
• Preliminary study of precious metals and stones along the Union Pacific Right-of-way of southern Wyoming
• Results of coal drilling projects in the Bighorn Basin, Wyoming
• Study of metals and precious stones in southern Wyoming