The land of sunshine, a handbook of the resources, products, industries and climate of New Mexico . s of lamination beneath. These highly metamorphosed masses are here referred tothe Algonkian age. They are more or less mineralized in thevarious mountain systems. They contain many of the exten-sive deposits of copper, iron, silver, gold and some of therarer metals. These rocks are well displayed in the Sandia,Manzano, San Andreas, Magdalena, Caballos, Black Range,Sangre de Cristo, Sacramento and other ranges. In central New Mexico, in the Sandia, Caballos, and SanAndreas ranges, there is a mas
The land of sunshine, a handbook of the resources, products, industries and climate of New Mexico . s of lamination beneath. These highly metamorphosed masses are here referred tothe Algonkian age. They are more or less mineralized in thevarious mountain systems. They contain many of the exten-sive deposits of copper, iron, silver, gold and some of therarer metals. These rocks are well displayed in the Sandia,Manzano, San Andreas, Magdalena, Caballos, Black Range,Sangre de Cristo, Sacramento and other ranges. In central New Mexico, in the Sandia, Caballos, and SanAndreas ranges, there is a massive quartzite, fifty to onehundred feet in thickness, the lower part of which is a con-glomerate, lying between the carboniferous limestone andthe metamorphics. It is conformable with the limestonesimmediately above it. This quartzite member reposes uponthe upturned ages of the Algonkian formations, indicatingclearly that an enormous erosion interval separates the some mountain ranges this quartzite carries importantcopper deposits. On the whole the carboniferous rocks of New Mexico are. FALLS OF THE NAMBE, NORTH OF SANTA FE. THE LAND OF SUNSHINE. 31 very important formations. They are found in the majorityof the principal mountain ranges. In most locahties they areimportant ore carriers. As guide horizons they deserve thefullest considerati(m in the location of mines. Four import-ant series of formations belonging to the carboniferous sys-tem have been clearly made out in New Mexico. They re-present the lower carboniferous, the middle carboniferous,the upper carboniferous and Oklahoman series. The netherseries of the carboniferous has been clearly differentiated ina number of localities. Principal of these places is LakeValley, in Sierra county. In the Sacramento mountains thefaunal equivalent of the Burlington limestone of the Missis-sippi Valley is well exposed. The great limestone plates which cap the princijial moun-tain ranges in central New Mexico, and which form
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