Skolithos linearis burrow in back-beach dune facies calcarenites (Hanna Bay Member, Rice Bay Formation, Holocene; Hanna Bay shoreline, San Salvador Island, Bahamas) 1 : 無料・フリー素材/写真
Skolithos linearis burrow in back-beach dune facies calcarenites (Hanna Bay Member, Rice Bay Formation, Holocene; Hanna Bay shoreline, San Salvador Island, Bahamas) 1 / 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 | Skolithos linearis (Haldeman, 1840) in back-beach dune facies aragonitic calcarenites (Hanna Bay Member, upper Rice Bay Formation, middle to upper Holocene) at Hanna Bay, northern part of eastern margin of San Salvador Island, eastern Bahamas.Trace fossils are indirect evidence of ancient life. They are structures representing the behavior of ancient organisms. Terrestrial traces are moderately common in the Quaternary limestones of San Salvador Island (& elsewhere in the Bahamas). The marine facies also have trace fossils.The trace fossil shown above is Skolithos linearis, a ~cylindrical, unbranched, vertical burrow. Traditionally, this trace fossil is considered diagnostic of high-energy, shallow-water conditions - most examples in the geologic record do occur in such facies. The above Skolithos is a terrestrial trace fossil, representing an insect or arachnid burrow (Curran et al., 1997; Martin, 2006).---------------------Curran, H.A., B. White & M.A. Wilson. 1997. Guide to Bahamian Ichnology: Pleistocene, Holocene, and Modern Environments. Bahamian Field Station. San Salvador Island, Bahamas. 61 pp.Haldeman, S.S. 1840. Supplement to Number One of “A Monograph of the Limniades, or Freshwater Univalve Shells of North America,” Containing Descriptions of Apparently New Animals in Different Classes, and the Names and Characters of the Subgenera in Paludina and Anculosa. Philadelphia. 3 pp. [= Miscellaneous Pamphlets on Natural History 14]Martin, A.J. 2006. Trace Fossils of San Salvador. Gerace Research Center. San Salvador Island, Bahamas. 80 pp. |
| 撮影日 | 2008-06-15 14:52:47 |
| 撮影者 | James St. John |
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