Ficheiro:Phanerozoic_Sea_Level.png
From Wikipedia, the free encyclopedia
Phanerozoic_Sea_Level.png (523 × 360 píxeles; tamaño do ficheiro: 23 kB; tipo MIME: image/png)
Este ficheiro procede de Wikimedia Commons. A continuación móstrase a información da súa páxina de descrición. Commons é un repositorio libre de ficheiros multimedia. Pode contribuír alí cargando as súas imaxes. |
Resumo
This figure compares the Hallam et al. (1983) and Exxon eustatic (global) sea level reconstructions for the Phanerozoic eon. The Exxon curve [1] is a composite from several reconstructions published by the Exxon corporation (Haq et al. 1987, Ross & Ross 1987, Ross & Ross 1988). Both curves are adjusted to the 2004 ICS geologic timescale.
Hallam et al. and Exxon use very different techniques of measuring global sea level changes. Hallam's approach is qualitative and relies on regional scale observations from exposed geologic sections and estimates of the areas of flooded continental interiors. Exxon's approach relies on the interpretation of seismic profiles to determine the extent of coastal onlap in subsequently buried sedimentary basins. Hallam is insensitive to rapid fluctuations in sea level. Exxon is sensitive to rapid fluctuations but tends to overinterpret local geologic changes resulting in bias towards reporting unphysical rapid fluctuations.
The depth scale is as reported by Exxon. Because Hallam is reported as qualtitative (i.e. uncalibrated), these sea level changes were scaled to match the Exxon record during the period 0–250 Myr.
A black bar is added to indicate the scale of sea level fluctuations during the last glacial/interglacial transition. This change occurred purely within the last 20 kyrs, and note that neither system of measurements is capable of resolving changes on this time scale. It also should be noted that very rapid fluctuations of similar scale are potentially possible during all periods during which large scale ice sheets are present (see: Phanerozoic climate change).
On the scale of this figure, the melting of all existing ice sheets would result in a sea level rise of ~80 meters. Changes on larger scales, which evidently occurred many times in the past, are the result of geologic changes in the structure of ocean basins. Essentially, such changes affect the average depth of the oceans relative to the continents.
Common symbols for geologic periods appear at the bottom.
Copyright
This figure was prepared by Robert A. Rohde from publicly available data and is incorporated into the Global Warming Art project.
Autorízase a copia, distribución e/ou modificación deste documento baixo os termos da licenza de documentación libre GNU, versión 1.2 ou calquera outra que posteriormente publique a Free Software Foundation; sen seccións invariables, textos de portada, nin textos de contraportada. Inclúese unha copia da devandita licenza na sección titulada GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
Este ficheiro está licenciado baixo a licenza Creative Commons recoñecemento compartir igual 3.0 sen adaptar. | ||
| ||
A etiqueta desta licenza engadiuse a este ficheiro como parte da actualización da licenza GFDL.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
References
- Hallam, A., Phil. Trans. Royal Soc. B 325, 437-455 (1989).
- Harland, W.B. and many others, A Geologic Time Scale, (1982).
- Haq, B., J. Hardenbol, P. Vail., Science, 235, 1156-1167 (1987).
- Ross, C.A. & J.R.P. Ross, Cushman Foundation for Foraminiferal Research Spec. Publ. 24, 137-149 (1987).
- Ross, C.A. & J.R.P. Ross in Sea-level Change: an Integrated Approach (Eds. Wilgus, C.K., Hastings, B.J., Posamentier, H., van Wagoner, J.C., Ross, C.A., and Kendall, C.G. St. C.), SEPM Spec. Pub. 42:71-108 (1988).
Notes
- Because Exxon traditionally used an in-house (i.e. unpublished) system for estimating the geologic age of stratigraphic sections it is not possible to perform an exact recalibration of the time scale. Instead it was adjusted assuming the Harland et al. 1982 time scale was a reasonable approximation.
derivative works
Obras derivadas deste ficheiro:
Elementos retratados neste ficheiro
representa a
image/png
Historial do ficheiro
Prema nunha data/hora para ver o ficheiro tal e como estaba nese momento.
Data/Hora | Miniatura | Dimensións | Usuario | Comentario | |
---|---|---|---|---|---|
actual | 27 de decembro de 2005 ás 02:24 | 523 × 360 (23 kB) | Angrense | Variation of the sea level during the Phanerozoic eon. Source:English versin of Wikipedia. |
Uso do ficheiro
A seguinte páxina usa este ficheiro:
Uso global do ficheiro
Os seguintes wikis empregan esta imaxe:
- Uso en ar.wikipedia.org
- Uso en ba.wikipedia.org
- Uso en be.wikipedia.org
- Uso en bg.wikipedia.org
- Uso en cs.wikipedia.org
- Uso en cv.wikipedia.org
- Uso en de.wikipedia.org
- Uso en en.wikipedia.org
- Uso en eo.wikipedia.org
- Uso en es.wikipedia.org
- Uso en fr.wikipedia.org
- Uso en hi.wikipedia.org
- Uso en hy.wikipedia.org
- Uso en it.wikipedia.org
- Uso en ja.wikipedia.org
- Uso en mk.wikipedia.org
- Uso en mn.wikipedia.org
- Uso en nl.wikipedia.org
- Uso en no.wikipedia.org
- Uso en pl.wikipedia.org
- Uso en pt.wikipedia.org
- Uso en ru.wikipedia.org
- Uso en sh.wikipedia.org
Ollar o uso global deste ficheiro.