THE OMX-MAKBLE DEPOSITS OF 



JIMULOO, OOAHUILA 



BY EZEQUIEL ORDONEZ, M. S. A. 



The important onyx marble deposits that I intend to des- 

 cribe, are situated in the foot-hills of many high mountains, 

 composing long Sierras on the grounds of the Hacienda de Ji- 

 mulco. These mountains have a general direction of east to 

 west and are separated by broad, dry and not steep valleys 

 along which good wagon roads permit in all seasons very easy 

 communication with towns and some stations of the Central 

 Railroad, which runs for a long distance through the lands of 

 the Hacienda de Jimulco and very near also the Aguanaval 

 River which serves as a boundary between Durango and Coa- 

 huila States. 



The onyx deposits are grouped in many places in such 

 numbers and capacity as to admit at each group the establish- 

 ment of a center of vast production. The deposits are main- 

 ly located in three regions. The largest one is west of Pe- 

 ralta Station on the Mexican Central R. R. about fourteen miles 

 distant on the wagon road going to Cuencame and other points 

 of Durango. This road follows the bottom of a broad valley 

 open to the river not far from the station of Peralta. The two 

 other centers of onyx deposits near the rancho de Pozo de Calvo 

 and "Las Viboras," lie three and four miles east respectively 



