CONTENTS. 
5 
Structure and conditions affecting the presence of oil—Continued. Page. 
Detailed discussion of structure—Continued. 
Region between San Rafael and Santa Ynez Mountains. 81 
Casmalia Hills and San Antonio Terrace. 81 
Burton Mesa. 83 
Purisima Hills. 84 
Folds.'. 84 
Faults and asphalt deposits. 85 
Conclusions regarding future development. 86 
Area around Santa Ynez. 86 
Solomon Hills and area north of Los Olivos. 87 
General features. 87 
Mount Solomon and associated anticlines. 87 
Structure. 87 
Asphaltum deposits. 88 
Conclusions regarding future development. 88 
Gato Ridge anticline. 88 
Structure... 88 
Evidences of petroleum. 89 
Conclusions regarding future development. 90 
La Zaca Creek-Lisque Creek anticline. 90 
Structure. 90 
Conclusions regarding future development. 91 
Summary of conclusions regarding future development. 91 
Details of the developed territory. 92 
Definition of fields. 92 
Santa Maria field. 92 
Contour map. 92 
What it shows. 92 
Basis of contour map. 92 
Difficulties of preparation. 93 
The wells.<•. 93 
Areas discussed. 93 
Oil zones. 93 
Hall-Hobbs-Rice ranch area. 94 
Location and structure. 94 
Geology of the wells. 94 
Product. 95 
Pinal-Fox-Hobbs area. 96 
Location and structure.. 96 
Geology of the wells. 96 
Product. 97 
Pinal-Folsom-Santa Maria Oil and Gas-Escolle area. 98 
Location and structure. 98 
Geology of the wells. 98 
Product. 99 
Hartnell-Brookshire area. 99 
Location and structure. 99 
Geology of the wells. 100 
Product. 101 
Graciosa-Western Union area*. 101 
Location and structure. 101 
Geology of the wfdls. 102 
Product... 102 
