Fossiliferous pyrite mass (Glenshaw Formation, Upper Pennsylvanian; Morgan County, Ohio, USA) 1 : 無料・フリー素材/写真
Fossiliferous pyrite mass (Glenshaw Formation, Upper Pennsylvanian; Morgan 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 | Fossiliferous pyrite mass from the Pennsylvanian of Ohio, USA. (cut surface)This remarkable rock consists of fossils in a pyrite matrix. It comes from a Pennsylvanian-aged cyclothemic succession in Ohio. Cyclothems are cyclical, unconformity-bounded packages of sedimentary rocks - sandstones, shales, clays, coals, and limestones, sometimes with chert / flint. Their formation resulted from facies shifting in response to repeated sea level changes. During the Late Paleozoic, sea level rises and falls occurred frequently as glacial ice sheets in Gondwana waxed and waned. Gondwana was a small supercontinent that consisted of the modern landmasses of South America, Africa, Antarctica, Madagascar, Arabia, India, and Australia. Stratigraphy: top of the Harlem Coal, upper Glenshaw Formation, middle Conemaugh Group, Upper PennsylvanianLocality: outcrop in Bloom Township, northern Morgan County, southeastern Ohio, USA |
| 撮影日 | 2022-04-02 16:14:57 |
| 撮影者 | James St. John |
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