Structural evolution of the Uinta Mountains, Utah, and their interaction with the Utah-Wyoming salient of the sevier overthrust belt

Page 169

A P P E N D IX C ‘ PALYNOLOGICAL DATA P a l y n o l o g i c a l d at a f r o m C r e t a c e o u s r o c k s in t h e R o c k p o r t L a k e r e g i o n (Plate 1) a nd i n t h e M o f fi t C r e e k d r a i n a g e ( P l a t e 2). T h e s a m p l e n u m b e r (e.g., P8 ) c o r r e s p o nd s to a s a m p l e locality s h o w n o n P l a t e s 1 a nd 2. A n a l y s e s a nd c o m m e n t s a r e b y S. N e l s o n a nd S. J a c o b s o n, C h e v r o n, USA. A f e w s a m p l e s f r o m N i c h o l s a nd B r y a n t ( 1 98 6 a ) are also i n c l ud ed . P1: ( 7 5 0' F W L, 6 0 0' F N L, 29-1N-5E) U p p e r C r e t a c e o u s H a m s F o r k C o n g l o m e r a t e M e m b e r o f the E v a n s t o n F o r m a t i o n . P2: ( 1 4 0 0' F W L, 1 4 0 0' F N L, 29-1N-5E) U p p e r C r e t a c e o u s H a m s F o r k C o n g l o m e r a t e M e m b e r of the E v a n s t o n F o r m a t i o n . P3: ( 18 0 0' F W L, 2 5 0 0 ‘ F N L, Cretaceous. P4: Sample O l i g o s p h a e r id i u m sp. ( 1 9 0 0' F W L, F N L, 2 6 0 0' 32-1N—5E) d a t ed Cretaceous b a s ed on single specimen of 28 — 1 N — 5 E ) C r e t a c e o u s . S a m p l e is d a t ed m id — u p p e r Frontier (upper C e n o m a n i a n - T u r o n i a n ) b a s ed o n a p a l y n o m o r p h a s s e m b l a g e i n c l ud i n g P a l a e o h y s t r i c h o p o r a i n f u s o r i o id e s a nd P5: A p p e nd i c i s p o r i t e s ( 9 5 0' F W L, 3 1 0 0' U p p e r C r e t a c e o u s, auritus. F N L, 28 - 1 N — 5 E ) L o w e r H i l l i a rd F o r m a t i o n equivalent. S a m p l e contains a n o n m a r i n e p a l y n o m o r p h a s s e m b l a g e i n c l ud i n g Q u ad r i p o l l i s k r e m p i i, M i c r o r e t i c u l a r i s p o r i t e s sp. 1, C i c a t r i c o s i s p o r i t e s s p p ., A p p e nd i c i s p o r i t e s C o s t a t o p e r f a r o s p o r i t e s sp.; s u g g e s t i n g a p o s s i b l e l o w e r H i l l i a rd e q u i v a l e n t . T h e s a m p l e d o e s n o t c o n t a i n P r o t e a c id i t e s sp. s p p ., a nd Formation