Shinier and Blodgett — Mt. Taylor Region, New Mexico. 55 



Fossils were collected at Great Neck, Neck 14 (a mile south- 

 west of Casa Salazar), Neck 3, and at three localities on the 

 road southeast of Cabezon. 



Description of Localities. 



Great Neck. — The almost horizontal Cretaceous strata show 

 at its base the septaria zone with a thickness of about 50 feet 



The septaria zone south of Salazar ; the septaria lie weathered out upon 

 the surface. 



occupying the upper portion. The only fossil found here was 

 Grypheea newberryi Stanton. This was found below the sep- 

 taria zone in the plain at the foot of Great Neck. 



As viewed from the foot of Great Neck, the strata at the 

 sides of Chivato and Prieta mesas dip gently north. Upon 

 their beveled edges rest remnants of the once extensive lava 

 flows. 



The septaria zone at Great Neck is about 700 feet higher, 

 according to the map contours, than at Salazar, eight miles 

 north, where it is found at the level of the town. From Great 

 Neck to Salazar its thickness of about 50 feet continues rather 

 constant. It is below the middle of a dark shale about 100 

 feet thick ; this shale is capped by a more resistant sandy bed 

 of 10 feet (this is the top bed of fig. 2). 



Neck 8, south of Salazar, has Cretaceous strata extending 

 almost to the top on the eastern side. The septaria zone lies 

 at its base. 



Salazar. — Fossils were collected from the septaria zone at 



