Program of study for the carnitite ores of the Colorado plateau

We have recently become especially interested in the desirability of having lead-ratio age determinations made of carefully selected ore samples throughout the Colorado Plateau area* lie understand that Mr. Lauren Stieff of your mineraloglcal lab is currently engaged in making such determinations on 12 of more than 100 samples collected for mineralogic research.We would greatly appreciate obtaining from Mr. Stieff a list of the samples he is working on, giving their geographic location, position in the stratigraphic column, and general mineralogic and petrographic make-up.It would also be helpful to have a statement of Mr. Stieff f s aims and plans for research on the Colorado Plateau ores in order that we may keep our Grand Junction geologists fully informed of the research work that is going forward in the Survey* Very truly yours,