Pennsylvanian sediments in northeastern Socorro County, New Mexico, in order of abundance, consist of shales, limestones, and sandstones and attain a thickness of about 740 feet. Insoluble residues, organic remains, and thin sections were utilized to determine characteristics of sediments, metasomatic changes, and environment of deposition. Metasomatic changes include: calcification, aragonite (?) to calcite; dolomitization, calcite to dolomite; silicification, calcite and dolomite to chalcedony; and alteration of undetermined minerals to illite. Sedimentation, in a relatively unstable, shallow geosyncline, was influenced by four positive areas of low to medium relief.

First Page Preview

First page PDF preview
You do not currently have access to this article.