Metagraywackes (Chelmsford Formation, Paleoproterozoic, 1.74 Ga; Larchwood North outcrop, Sudbury Impact Structure, Ontario, Canada) 15 : 無料・フリー素材/写真
Metagraywackes (Chelmsford Formation, Paleoproterozoic, 1.74 Ga; Larchwood North outcrop, Sudbury Impact Structure, Ontario, Canada) 15 / 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 | Metagraywackes in the Precambrian of Ontario, Canada.These rocks have been interpreted to be part of a proximal turbidite succession. This unit occurs only within the Sudbury Basin. A relatively large muscovite mica grain was found in a sample here - the rocks are definitely immature sandstones.Stratigraphy: Chelmsford Formation, upper Whitewater Group, upper Paleoproterozoic, 1.74 GaLocality: Larchwood North outcrop, eastern side of Rt. 144, immediately south of narrow side road on the northern end of a railroad overpass, just north of the town of Larchwood, Sudbury Impact Structure, Ontario, southeastern Canada (46° 34’ 30.03” North latitude, 81° 17’ 19.86” West longitude) (= stop 20 of Rousell et al. (2009) - A field guide to the geology of Sudbury, Ontario. Ontario Geological Survey Open File Report 6243, p. 154.) |
| 撮影日 | 2012-07-15 17:30:14 |
| 撮影者 | James St. John |
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