CHURCH HILLS, MILLARD COUNTY, UTAH by R o b e r t Lewis S a y r e A t h e s i s s u b m i t t e d t o t h e f a c u l t y of t h e U n i v e r s i t y of Utah i n p a r t i a l f u l f i l l m e n t of t h e r e q u i r e m f o r t h e d e g r e e of M a s t e r of S c i e n c e M i n e r a l o g y A r e a , D e p a r t m e ;d(Z dd!t =--, � � -,-,--� _ Chairman, Sup�rvisory Committee • Chairman, Major Department o t hers who contributed their time : Rober t Cohenour; John Osmund ; Greta Bauer

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... the U, S. Bureau of ~Iines, for se l en i um analyses; Ray Broadhead of Chemical and Nineralogical Services , for assays and analysis of ma trix stanclards ; Da\'id Budge, for assistance ~ith fossil material ; Len Varga s , for making nestable leucite sieves ; lind Brent Jone s , for drafting the maps . My tasks have been li gh tened cons i derably by the many helpful discu ss ions ',;ith my colleagues, Armand Beers and Uldis Jansons . iii UNIVERSIl Y CF UTAH LIBRARIE I w i s h t o t h a n k M a r i o n S t e v e n s , of H o l d e n , U t a h , f o r p e r m i s s i o n t o u s e h i s c l a i m s a s s u b j e c t m a t e r i a l f o r t h i s t h e s i s . The c o s t of t h e l a b o r a t o r y a n a l y s e s h a s b e e n d e f r a y e d i n p a r t by t h e D e p a r t m e