. The Cuba review. Cuba -- Periodicals. 22 THE CUBA REVIEW. Left—Well No. 5 of the Union Oil Co., where the Petroleum came up in large quantities. Right—1,000-lb. tank installed in the "Jorge" mine at Bacuranao.— Cuban & Pan-American Petroleum and Refining Co. Union Oil Co. for the delivery of its petroleum over the pipe line, at the rate of one cent per gallon. The borings made by these four companies on the Santiago, Jorge and Jorge Candido properties are all grouped in an area that does not exceed 20,000 square meters. Nearly all have produced petroleum at a depth of approxima
. The Cuba review. Cuba -- Periodicals. 22 THE CUBA REVIEW. Left—Well No. 5 of the Union Oil Co., where the Petroleum came up in large quantities. Right—1,000-lb. tank installed in the "Jorge" mine at Bacuranao.— Cuban & Pan-American Petroleum and Refining Co. Union Oil Co. for the delivery of its petroleum over the pipe line, at the rate of one cent per gallon. The borings made by these four companies on the Santiago, Jorge and Jorge Candido properties are all grouped in an area that does not exceed 20,000 square meters. Nearly all have produced petroleum at a depth of approximately 1,000 ft., most of them in small quantities, but they still can be considered as producing on a commercial basis a product which is salable at a good price. Certain it is that we are very far from producing the enormous quantities of the wells of the United States, or even those of Mexico, but the results obtained in Bacuranao are very encouraging, especially as the explorations so far have been confined to moderate depths, and we have greater depths still waiting, which up to the present is a field unexplored. PETROLEUM FIELDS.—Many theories which we need not recall here have been ad- vanced in regard to the origin of petroleum. From the geologist's viewpoint, petroleum is found in many different geological formations. In Pennsylvania it is found in the Devonic and Car- boniferous; in Canada in the Silurian; in the State of Colorado, in the Cretaceous; in Virginia, in bituminous coal lands; in South Carolina in the Triassic; in Venezuela in the mica rocks; in the Caucasus, in cretaceous rocks. No fixed rule, therefore, can be alleged in regard to geological formations. In Cuba petro- leum has been found in small quantities in strata belonging to the cretaceous period, corres- ponding to the secondary age. A remarkable fact, observed by all geologists who have visited the Island, is that petroleum is always associated here with igneous rocks. So far all the oil has
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