Town Mountain Granite Age

The age of these metamorphic rocks range from range from 1 29 to 1 23 ga.

Town mountain granite age.

The town mountain granite the most famous granite in texas was used to construct the state capitol building as well as many other state office buildings in. Town mountain granite description. Coarse grained pink quartz plagioclase microcline rock in part porphyritic with large microcline phenocrysts. The k feldspar is so pervasive in the granite that large exposures literally turn the landscape a pink color.

Proterozoic 541 2500 ma stratigraphic name. Boundaries range from sharp and regular to highly irregular with. Occurs in plutons up to 13 mi in size that tend to be concordant circular vertical cylinders with concentric textural variaions. Town mountain is a bluegrass band from asheville north carolina.

The pink rock exposed here is the town mountain granite the famous texas pink polished dimension stone that is used throughout north america. Precambrian proterozoic lithologic constituents. The origin of the town mountain granite but tightly dated to late mesoproterozoic times is a minor mystery. The packsaddle domain consists mainly of schists composed of hornblende biotite muscovite and actinolite.

Marbles and calc silicate rocks. Deposition occurred in braided stream channels and tidal flats of a coastal plain and delta environment that extended across the region about 500 440 million years ago. In the southeast of the park packsaddle schist a medium grade gray ish metamorphic rock can be found along the creek. The primary components of town mountain granite include.

The rock is actually the visible above ground part of a segmented ridge the surface expression of a large igneous batholith called the town mountain granite of middle precambrian 1 082 6 million years ago material that intruded into earlier metamorphic schist called the packsaddle schist. Coarse grained pink quartz plagioclase microcline rock in part porphyritic with large microcline phenocrysts. Enchanted rock is a small geologically speaking pink granite outcrop of a larger complex called the town mountain granite an instrusive igneous rock of pre cambrian in age. Major igneous plutonic granitic granite pluton comments.

Total station mapping area at inks lake state park texas. Town mountain granite precambrian age enchanted rock enchanted rock state natural area llano county texas 1.