Mississippian-Pennsylvanian boundary (GSSP) (lower Bird Spring Formation; Arrow Canyon, southern Nevada, USA) : 無料・フリー素材/写真
Mississippian-Pennsylvanian boundary (GSSP) (lower Bird Spring Formation; Arrow Canyon, southern Nevada, USA) / 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 | The global stratotype section and point (GSSP) for the Mississippian-Pennsylvanian boundary is in fossiliferous limestones of the lower Bird Spring Formation at this very site. The geology hammer handle is pointing to the boundary. This is the global definition for the Mississippian-Pennsylvanian boundary.Locality: Arrow Canyon, Arrow Canyon Range, southern Nevada, USA |
| 撮影日 | 2001-12-07 18:47:02 |
| 撮影者 | James St. John |
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