Paleosol (Mill Knob Member, Slade Formation, Upper Mississippian; Clack Mountain Road Outcrop, south of Morehead, Kentucky, USA) 7 : 無料・フリー素材/写真
Paleosol (Mill Knob Member, Slade Formation, Upper Mississippian; Clack Mountain Road Outcrop, south of Morehead, Kentucky, USA) 7 / 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 | Paleosol in the Mississippian of Kentucky, USA.This outcrop is part of the Upper Mississippian Slade Formation in Kentucky. The unit was formerly known as the Newman Limestone ("They always change the names to protect the innocent!"). Slade Formation limestones are shallow ocean deposits. This section has numerous paleosol horizons (= ancient soils).The reddish & greenish-gray material in the photo is a paleosol (= soil 4 of Ettensohn & Lierman, 1992). Remnants of gray limestone are still present.------------------------------From Ettensohn & Lierman (1992):"Soil 4 consists of 1.5 to 1.8 meters (5 to 6 feet) of residual terra-rossa claystone containing Mill Knob micrite. One band of Warix Run arenaceous calcarenite is also present near the base. Layers of clasts and claystone undulate throughout the deposit suggesting that the calcilutite layers had been warped into caliche pseudo-anticlines ("tepees") before dissolution. Blocky peds and stress cutans (slickensides) are present throughout the unit. The parent material or C horizon for this soil is almost completely lacking, except for the isolated clasts, having been nearly destroyed by solution. Nonetheless, the relict clasts indicate that the parent material was probably a thin-bedded Mill Knob calcilutite or micrite."------------------------------Stratigraphy: Warix Run Member over Mill Knob Member, Slade Formation, Upper MississippianLocality: roadcut next to the Clack Mountain Road-Route 519 intersection, south of Morehead, Kentucky, USA (vicinity of 38° 07’ 41.87” North latitude, 83° 24’ 47.04” West longitude)------------------------------Reference cited:Ettensohn & Lierman (1992) - Stop 17 - Chesterian, humid-type residual paleosols from the Slade Formation. in: Paleoclimate controls on Carboniferous sedimentation and cyclic stratigraphy in the Appalachian Basin. United States Geological Survey Open File Report 92-546: 85-87. |
| 撮影日 | 2018-03-11 12:41:51 |
| 撮影者 | James St. John |
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