Small faults in seismite horizon (Cowbell Member, Borden Formation, Lower Mississippian; Portsmouth Bypass roadcut, Ohio, USA) 2 : 無料・フリー素材/写真
Small faults in seismite horizon (Cowbell Member, Borden Formation, Lower Mississippian; Portsmouth Bypass roadcut, 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 | Small faults in seismite horizon in the Mississippian of Ohio, USA.The small faults and the non-horizontal bedding here are not structural in origin. This is a roadcut in southern Ohio - bedrock in Ohio is almost exclusively ~horizontal sedimentary rocks. The tilted bedding is part of a seismite horizon. Seismites are intervals or horizons of soft-sediment deformation, within which bedding is disrupted, folded, and chaotic. Such horizons have also been called "flow rolls". The soft-sediment deformation was caused by ancient seismic events (earthquakes), during which sediments were disturbed, probably liquefied, and moved/flowed. Sediment liquefaction often accompanies significant earthquakes in modern times.The rocks are part of the Cowbell Member, a siltstone-dominated unit in a deltaic succession of Early Mississippian age called the Borden Formation.Stratigraphy: Cowbell Member, upper Borden Formation, Lower MississippianLocality: Portsmouth Bypass roadcut, west of Rose Hill & north of Thomas Hollow Road, northern Scioto County, southern Ohio, USA---------------------See info. on earthquake liquefaction:en.wikipedia.org/wiki/Soil_liquefaction#Earthquake_liquef...andgeomaps.wr.usgs.gov/sfgeo/liquefaction/aboutliq.html |
| 撮影日 | 2019-05-05 11:44:50 |
| 撮影者 | James St. John |
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