Geological Process Did Not Form These Rings. : 無料・フリー素材/写真
Geological Process Did Not Form These Rings. / Wretch Fossil
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Image enlarged from it.wikipedia.org/wiki/Ooliti#/media/File:Ooid_lammelae_cl... The above image is an electron microscopy showing a cross section of an ooid, which is smaller than 2 mm across. Eighteen red lines mark concentric rings of layers within an ooid. Geological abrasion can not produce such rings.In fact, ooids are formed by microbes as evidenced in the following articles:1. Miller, C. R., & James, N. P. (2012). Autogenic Microbial Genesis of Middle Miocene Palustrine Ooids; Nullarbor Plain, Australia. Journal of Sedimentary Research, 82(Harrison 1977), 633–647. doi.org/10.2110/jsr.2012.602. O’Reilly, S.S., Klepac-Ceraj, V., Winter, A.R., Bosak, T., McDermott, F., Summons, R.E. (2015). Molecular evidence for a microbial role in modern ooid formation and implications for their occurrence and meaning in the geological record. Astrobiology Science Conference 2015 www.hou.usra.edu/meetings/abscicon2015/pdf/7317.pdf3. Plee, K., Ariztegui, D., Martini, R., & Davaud, E. (2008). Unravelling the microbial role in ooid formation - results of an in situ experiment in modern freshwater Lake Geneva in Switzerland. Geobiology, 6(4), 341–350.http://doi.org/10.1111/j.1472-4669.2007.00140.x4. Summons, R. E., Bird, L. R., Gillespie, A. L., Pruss, S. B., Roberts, M., & Sessions, A. L. (2013). Lipid biomarkers in ooids from different locations and ages: Evidence for a common bacterial flora. Geobiology, 11(5), 420–436.http://doi.org/10.1111/gbi.12047 |
| 撮影日 | 2016-03-31 14:53:10 |
| 撮影者 | Wretch Fossil |
| 撮影地 |
