Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, USA) 2 : 無料・フリー素材/写真
Stromatolitic limestone (Big Horse Limestone Member, Orr Formation, Middle Cambrian; Orr Ridge, House Range, Utah, 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 |
|---|---|
| 説明 | Stromatolitic limestones in the Cambrian of Utah, USA. (cross-section view; geology hammer for scale)Stromatolites are layered structures built up by mats of cyanobacteria (= blue-green bacteria, often incorrectly called “blue-green algae”). Stromatolites are fairly common in portions of the shallow-water marine & nonmarine fossil record, but they also occur in a few modern localities (e.g., Shark Bay along coastal Western Australia).Stratigraphy: Big Horse Limestone Member, Orr Formation, upper Marjuman Stage; almost uppermost Middle CambrianLocality: ridge crest of Orr Ridge, eastern flanks of the House Range, Millard County, western Utah, USA (vicinity of 39˚ 11' 56.37" North latitude, 113˚ 18' 47.91" West longitude) |
| 撮影日 | 1999-09-14 00:00:00 |
| 撮影者 | James St. John |
| タグ | |
| 撮影地 |