Igneous Rock Areas in the Norris Region, Tennessee
1944; University of Chicago Press; Volume: 52; Issue: 6 Linguagem: Inglês
10.1086/625238
ISSN1537-5269
Autores Tópico(s)Geochemistry and Geologic Mapping
ResumoTwo small areas of mica-peridotite occur in Union County, Tennessee, near the "Great Bends" of the Clinch River. They appear to be outcrops of inclined basic plugs that were intruded along or near the plane of a major fault. The magma appears to have been at a low temperature when intruded, as it did not metamorphose the sedimentary rock with which it came in contact. The age of the intrusion cannot be definitely determined. The youngest sedimentary rock cut by the peridotite is the Chattanooga black shale of Missis-sippian age. Therefore, intrusion was later than the early part of the Mississippian period. These plugs are of special interest because they are in an area that has long been considered a sedimentary province without any intrusions.
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