Clarence Samuel Ross

1880

• Ash-flow tuffs
• Halloysite and allophane
• Minerals of the Montmorillonite group
• Mordenite and associated minerals from near Challis, Custer county, Idaho
• Occurrence and origin of the titanium deposits of Nelson and Amherst counties, Virginia
• Origin of the copper deposits of the Ducktown type in the southern Appalachian region
• The kaolin minerals
• The optical properties and chemical composition of Glauconite
• Water-laid volcanic rocks of early upper Cretaceous age in southwestern Arkansas, southeastern Oklahoma, and northeastern Texas