Bulletin of the Scientific Laboratories of Denison University. 
Vol. XI. Article V, with a sketch Map. Plate XIII. December, i8g8. 
*THE GEOLOGY OF THE SAN PEDRO AND THE 
ALBUQUERQUE DISTRICTS. 
By C. L. Herrick, 
President of the University of New Mexico. 
The following pages are the results of a reconnaisance of 
the area covered by the so-called San Pedro sheet of topogra- 
phy issued by the government and a corresponding area lying 
west of that district. The country was visited by wagon and 
no instrumental work was done, distances being read by odom- 
eter and elevations by barometer. While a large part of the 
area has been personally visited and a great deal more material 
has been collected than can be made available at this time, it 
seems best to issue these notes as a guide to further work. It 
is to be expected and hoped that fuller details will be gathered 
and that the conclusions here reached may be modified by more 
extended comparison with adjacent parts of the territory. No 
attempt is made to touch upon the mineral resources, as this 
subject may be made the basis for a distinct paper. The pale- 
ontology and petrography are well under way but it was not 
thought wise to anticipate the fuller description of the final pa- 
per. Much of the area here described would be called a desert 
in eastern America while other portions are well-wooded and 
provided with flowing streams. In general, all but the lava beds 
is capable of supporting cattle and sheep. The southeastern 
portion is still well timbered. The means not being available 
to engrave a geological map the accompanying sketch is pro- 
vided as a guide to the reader. For other contributions to the 
geology of New Mexico and the particular region under discus- 
sion compare a series of articles in the American Geologist, 
Sept., 1898, April, 1897, and July and Oct., 1898. 
’-'Read before the Denison Scientific Association, December 10, 1898. 
