Dundee Limestone over Lucas Dolomite (Middle Devonian; Auglaize Quarry, near Junction, Ohio, USA) 12 : 無料・フリー素材/写真
Dundee Limestone over Lucas Dolomite (Middle Devonian; Auglaize Quarry, near Junction, Ohio, USA) 12 / 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 | Limestones and dolostones in the Devonian of Ohio, USA.This is the active wall at a functioning quarry in far-northwestern Ohio. We were forbidden from closely approaching the walls. Large, loose blocks of rock were piled on the quarry floor for close examination and mineral collecting.The gray-colored rocks in the top third of the wall are the Dundee Limestone, a Middle Devonian unit equivalent to the upper Columbus Limestone and Delaware Limestone elsewhere in Ohio. At this site, the Dundee is principally light gray to gray-brown micrite and dismicrite. These lithologies are sometimes referred to as lithographic limestone and sublithographic limestone. Stylolites are present, as are numerous patches of coarsely-crystalline calcite.The brownish-colored rocks in the middle and lower walls are the Lucas Dolomite of the upper Detroit River Group. The Lucas appears to consist of dolostone and limestone. Finely-laminated, brown dolostone is a common lithology in this unit. Lack of stratigraphic control in the loose quarry blocks makes specific lithologic assessments difficult. Stylolites are also present in the Lucas.Stratigraphy: Dundee Limestone over Lucas Dolomite, Middle DevonianLocality: Auglaize Quarry (= Shelly Company, Stoneco's Auglaize Facility), southeast of the town of Junction, northeastern Paulding County, northwestern Ohio, USA (41° 10' 27.83" North latitude, 84° 25' 19.75" West longitude) |
| 撮影日 | 2019-09-14 06:37:50 |
| 撮影者 | James St. John |
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