Dissolution-pitted dolostone (Joppa Member, Ste. Genevieve Limestone, Middle Mississippian; Crystal Onyx Cave, near Cave City, Kentucky, USA) 15 : 無料・フリー素材/写真
Dissolution-pitted dolostone (Joppa Member, Ste. Genevieve Limestone, Middle Mississippian; Crystal Onyx Cave, near Cave City, Kentucky, USA) 15 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Dissolution-pitted dolostone in the Mississippian of Kentucky, USA.Crystal Onyx Cave is a relatively small, speleothem-rich cave on the eastern flank of Prewitts Knob, southwest of the town of Cave City, Kentucky, USA. The walls of the cave are limestones and dolostones of the Ste. Genevieve Limestone (upper Middle Mississippian). Pitted, off-white colored dolostone occur above grayish limestones. The whitish rocks are dissolutionally-pitted dolostones of the Joppa Member (see above).Crystal Onyx Cave was discovered in 1960 as a sinkhole. The name of the cave refers to the whitish-colored travertine (composed of calcite). Fifty-three Indian bones dating to about 680 B.C. were found wrapped up at the bottom of the main shaft of this cave.The photos in this album were taken in boreal summer 2008. The cave closed in 2008 or 2009 when a cell phone company (Bluegrass) bought the entire hill of Prewitts Knob to prevent competition from other cell phone companies. The hill now has cell phone towers.Locality: Prewitts Knob, ~2 air miles southwest of Cave City, northwestern Barren County, southwest-central Kentucky, USA (37° 06' 36.27" North latitude, 85° 58' 26.12" West longitude) |
| 撮影日 | 2008-07-17 16:42:41 |
| 撮影者 | James St. John |
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