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・ Solitaire (musician)
・ Solitaire (Neil Sedaka album)
・ Solitaire (Neil Sedaka song)
・ Solitaire (ship)
・ Solitaire (Uri Caine album)
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Solitario
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Solitario : ウィキペディア英語版
Solitario

The Solitario is a large geologic formation in Big Bend Ranch State Park in West Texas. Viewed from above it suggests an impact crater, though it is actually the eroded remains of a laccolith. The approximate center of the Solitario is located east southeast of Presidio, Texas, just west of the line dividing Brewster County, Texas and Presidio County, Texas. The formation covers a circular area of approximately . The geology of the Solitario is complex. In 1988 the state of Texas purchased the property containing the Solitario and created Big Bend Ranch State Park.
The formation lies in the Chihuahuan Desert ecoregion of the United States.
==Geology==
The Solitario is a structural dome developed in Paleozoic and Cretaceous rocks above an Eocene granite laccolith intrusion. The dome is associated with radial rhyolite to trachyte dikes and sills and erupted ash flow tuffs. The 16 km diameter dome contains a 6 by 2 km volcanic cauldera filled with collapse breccia, tuff, and trachyte lava.
The Paleozoic rocks of the dome consist of a 2.6 km thick section of intensely folded Cambrian through Early Pennsylvanian sediments. The Paleozoic rocks were deformed and thrust into the area from the southeast during the Ouachita orogeny. Following the Permian uplift and erosion during most of the Mesozoic was followed by deposition of Cretaceous carbonate rocks which correlate with the Cretaceous of the Gulf Coast. The area was uplifted by the Laramide orogeny during latest Cretaceous. Following the Eocene intrusive and volcanic events of the Solitario, the area was partially covered by volcanic rocks from the adjacent Bofecillos volcanic center to the west of the area during the Oligocene and early Miocene. Erosion and downcutting following the Pleistocene deepening of the Rio Grande to the southwest and south have produced the current topographic expression of the area.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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