THE ONYX-MARBLE DEPÜSITS OF 



ji]MXJLCO, ooa.h:tjil^ 



BY EZEQUIEL ORDOÑEZ, M. S. A. 



The important ouyx marble deposits that I intend to des- 

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

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

 miilco. These mountains have a general direction of east to 

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

 along which good wagón roads permit in all seasons very easy 

 communication with towns and some stations o£ the Central 

 Railroad, which runs for a long distance through the lands o£ 

 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 adiigit at each group the establish- 

 ment o£ a center o£ vast production. The deposits are main- 

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

 ralta Station on theMexican Central R. R. about £ourteen miles 

 distant on the wagón road going to Cuencamó and other points 

 of Durango. This road £ollows the bottom o£ a broad valley 

 open to the river not f ar £rom the station of Peralta, The two 

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

 and "Las Víboras," lio three and four miles eflast respectively 



