ABSTRACT
Beds of oolitic hematite as much as 15 feet thick are common in the Bliss sandstone (Upper Cambrian) of southwestern New Mexico. These are exposed in outcrops as much as several miles in length in the Caballo, San Andres, Black, and Silver City mountains. The oolitic ores appear to be associated with a calcareous, glauconitic, and hematitic facies of the Bliss sandstone. It is concluded that the iron content of the deposits is almost entirely syngenetic and that deposition may have been mechanical as well as chemical. Much of the hematite has been diagenetically rearranged and considerably recrystallized, with the result that the oölites are in various stage of obliteration.
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