New Providence Shale over New Albany Shale (Mississippian over Devonian; MacDonald Knob Outcrop, Bullitt County, Kentucky, USA) 1 : 無料・フリー素材/写真
New Providence Shale over New Albany Shale (Mississippian over Devonian; MacDonald Knob Outcrop, Bullitt County, Kentucky, USA) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Shales in the Paleozoic of Kentucky, USA.The gray slopes in the upper part of the picture is the New Providence Shale, a member of the Borden Formation, a deltaic succession of Early Mississippian age. Here, the New Providence is mostly gray clayshales. Phosphatic nodules are concentrated at the base in a glauconitic shale.This weathered, iron oxide-stained, black shale outcrop in the lower part of the picture is the New Albany Shale of Kentucky and Indiana. The unit consists of dark-colored, chippy-weathering, marine mudshales of Late Devonian age. These black shales were deposited in a moderately deep, anoxic seafloor environment. This was a widespread lithofacies during the Late Devonian's Global Anoxia Event. The New Albany Shale is equivalent to the Ohio Shale, the Antrim Shale, and the Chattanooga Shale in surrounding states.Stratigraphy: New Providence Shale Member of the Borden Formation (Lower Mississippian) over New Albany Shale (Upper Devonian)Locality: MacDonald Knob Outcrop - roadcut along side road, west of the interstate, between Shepherdsville & the southern outskirts of Louisville, Bullitt County, Kentucky, USA (38° 00’ 44.51” North latitude, 85° 41’ 59.51” West longitude) |
| 撮影日 | 2018-03-15 13:20:22 |
| 撮影者 | James St. John |
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