Fossiliferous chert nodule in fossiliferous limestone (Boggs Limestone, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 2 : 無料・フリー素材/写真
Fossiliferous chert nodule in fossiliferous limestone (Boggs Limestone, Pennsylvanian; Rt. 93 roadcut north of Mt. Pleasant, Hocking County, Ohio, USA) 2 / 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 | Fossiliferous chert nodule in fossiliferous limestone in the Pennsylvanian of Ohio, USA.The Boggs Member is a relatively thin stratigraphic interval in the Pennsylvanian of eastern Ohio, USA. It typically consists of marine fossiliferous limestones, dominated by brachiopods and crinoid ossicles. Significant lateral lithologic variation is present - Boggs lithologies range from fossiliferous limestone to intraclastic limestone to ferruginous chert to "flint" to dolostone. In places, it has a relatively high component of disseminated pyrite. In other places, it is relatively rich in black manganese oxide(s).Minerals observed in the Boggs Limestone interval: calcite, dolomite, glauconite, goethite, gypsum, limonite, pyrite, sphalerite, turgite, vivianite, wad.The dark-colored, projecting masses shown above are chert nodules - they contains numerous small, whitish-colored fossils and fossil fragments. The grayish-brown material surrounding the chert nodules is fossiliferous limestone.Stratigraphy: Boggs Member, middle Pottsville Group, lower Atokan Stage, lower Middle PennsylvanianLocality: large talus block at the base of Mt. Pleasant North Outcrop - roadcut on the eastern side of Rt. 93, just north of the town of Mt. Pleasant, southern Washington Township, southern Hocking County, southeastern Ohio, USA (39° 23' 51.35" North latitude, 82° 27' 14.15" West longitude) |
| 撮影日 | 2015-10-17 13:32:32 |
| 撮影者 | James St. John |
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