PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VIII, No. 4, pp. 113-156, pi. 3-6 July 19, 1918 



IV 



GEOLOGY OF THE NORTHERN END OF THE 

 TAMPICO EMBAYMENT AREA 



E. T. DUMBLE / , 



Consulting Geologist, Southern Pacific (MJi^t^'h ^^'• 



Introduction 



The attention of the writer was first directed to the eastern 

 coast of Mexico as an oil field in 1890, during which year Mr. 

 Josiah Owen, then of Eagle Pass, Texas, and later an asso- 

 ciate for many years in coal and oil investigations for the 

 Southern Pacific Company, made a reconnaissance trip through 

 the region between Tampico and Tuxpam, and sent samples of 

 heavy oil and asphalt for examination, together with a general 

 statement as to the oil conditions, which he considered highly 

 favorable. 



In 1899 the matter was brought to the attention of Mr. C. P. 

 Huntington as well worth investigation by the Southern Pacific 

 Company, but it was thought at that time to be too far removed 

 from other interests of the Company. 



In 1908 the subject was again placed before the management, 

 and an examination was ordered. Prof. W. F. Cummins, who 

 was well acquainted with the geology of the coastal oil fields of 



July 19. 1918 



