THE WEST POINT, TEXAS, SALT DOME 649 



were run along the principal roads, around the circular drainage, 

 and across the mound. 



An attempt was made to express the drainage exactly, the 

 essential topography, and sufficient dips and strikes to outhne the 

 dome structure. Many dip and strike observations could have 

 been made in addition to those recorded. No attempt was made 

 to map all of the springs and water seepages. A complete map of 

 the dome should express in greater detail the topography outside 

 of the circular strike drainage. 



The writer has withheld this map in the hope of being able to 

 make further field studies, but as the opportunity for such work 

 seems remote, he offers the map in its present form as a contribution 

 to the geology of salt domes. Acknowledgment is due and grate- 

 fully rendered to Earle S. Porter for his assistance in mapping the 

 dome, to Lewis C. Chapman for much information regarding the 

 dome, and to Sidney Powers, whose sketch and notes regarding a 

 part of the dome the writer has seen. 



LOCATION 



The West Point salt dome lies some five to seven miles north of 

 the town of Oakwood on the International and Great Northern 

 Railroad, and extends from a mile or two east of Butler post-office 

 to the western edge of the flood plain of the Trinity River (Fig. 2). 



It is the southernmost known dome of the interior group of salt 

 domes and forms a triangle with the nearby Palestine dome, the 

 center of which lies some 9 miles N. 51° E., and with the Keechi 

 dome, the center of which lies some 14.7 miles N. 34° E. from the 

 center of the West Point dome. The remaining known domes of 

 the interior group in Texas are the Brooks dome, some 39 miles 

 N. 34° E.; the Steen dome, some 69 miles N. 27° E.; and Grand 

 Saline, some 74 miles N. 9° E. 



It will be noticed that West Point, Keechi, and the Brooks 

 dome lie on a straight hne striking N. 34° E. The Palestine and 

 Steen domes lie near this line. This line of strike is roughly parallel 

 to that of the Balcones fault, which strikes N. 25-30° E., and is some 

 70 miles distant, as well as roughly parallel to the belts formed by 

 the outcrop of various Tertiary formations to the westward. 



