Moppin Complex
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The Moppin Complex is a Precambrian geologic complex found in the Tusas Mountains of northern New Mexico. It has not been directly dated, but is thought to be Statherian based on a minimum age of 1.75
Moppin Complex at the Iron Mountain reference section
Moppin Complex at Placer Creek.
Greenschist of the Moppin Complex. This is the predominant rock type in the complex.
Feldspathic schist of the Moppin Complex on Hopewell Ridge.
Trondhjemite
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Trondhjemites are leucotonalites, a variety of leucocratic tonalite in which the modal mineralogy mostly consists of plagioclase in the form of albite to andesine, >20% quartz, and <10% alkali feldspa
Moppin Complex
…subsurface well to the north and east into the San Juan basin. The Moppin Complex is intruded by plutonic rocks, including the Maquinita Granodiorite, the trondjhemite of Rio Brazos, dikes and sills of the Burned Mountain Formation, the Tusas Mountain Orthogneiss, and the Tres Piedras Orthogneiss. The Maquinita…
Tonalite-trondhjemite-granodiorite migmatite (left) and trondhjemitic gneiss (right) from northern China