Lower Mercer Limestone (Middle Pennsylvanian) (Symmes Creek, Mollies Rock Road bridge, Muskingum County, Ohio, USA) 1 : 無料・フリー素材/写真
Lower Mercer Limestone (Middle Pennsylvanian) (Symmes Creek, Mollies Rock Road bridge, Muskingum County, Ohio, 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 |
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| 説明 | The Pottsville Group is a Pennsylvanian-aged cyclothemic succession in eastern Ohio that contains nonmarine shales, marine shales, siltstones, sandstones, coals, marine limestones, and chert ("flint"). The lower Pottsville dates to the late Early Pennsylvanian. The upper part dates to the early Middle Pennsylvanian. The Lower-Middle Pennsylvanian boundary is apparently somewhere near the Boggs Member (?).The Lower Mercer Limestone is a laterally persistent, marine fossiliferous limestone unit in the Pottsville Group. Just above the limestone is the Lower Mercer Shale - a fossiliferous marine calcareous shale.Stratigraphy: Lower Mercer Limestone, Pottsville Group, lower Middle PennsylvanianLocality: creek cut along the northern bank of Symmes Creek, just upstream of the North Fork/North Branch confluence & just upstream of the Mollies Rock Road bridge over Symmes Creek, Madison Township, northern Muskingum County, eastern Ohio, USA |
| 撮影日 | 2015-03-28 11:41:42 |
| 撮影者 | James St. John |
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