File:Geological time spiral.png
原始文件 (2,424 × 2,145像素,文件大小:1.86 MB,MIME类型:image/png)
说明
This image was selected as picture of the day on Wikimedia Commons for 11 June 2009. It was captioned as follows: English: A diagram of the geological time scale Other languages:
Bahasa Indonesia: Diagram skala waktu geologi yang berbentuk spiral Čeština: Schématické znázornění geologické časové škály Deutsch: Visuelle Darstellung der Erdzeitalter als Zeitspirale mit englischer Beschriftung (eine deutsche Version der Grafik ist derzeit nicht vorhanden) English: A diagram of the geological time scale Español: Diagrama de la escala de tiempo geológica Français : Diagramme de l'échelle des temps géologiques. Italiano: Diagramma della scala dei tempi geologici. Magyar: A geológiai időskála szemléltetése Nederlands: Engelstalige visuele presentatie van de geologische tijdschaal in de vorm van een spiraal Polski: Diagram przedstawiający skalę czasu geologicznego. Română: Diagramă a istoriei geologice a Pământului Slovenščina: Diagram geoloških dob (napisi v angleščini) Македонски: Приказ на геолошките периоди मराठी: विविध भूशास्त्रीय काळ दाखवणारे चित्र 한국어: 지질학적 연대표. 日本語: ら旋状の地質学年表 中文: 地质学时标图 中文(繁體): 地質學時標圖 עברית : דיאגרמה של סקאלת זמן גיאולוגי |
This image was selected as picture of the day on Vietnamese Wikipedia.
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摘要[编辑]
描述Geological time spiral.png |
English: A diagram of the geological time scale
Esperanto: Diagramo montranta la geologian temposkalon
Français : Diagramme montrant l'échelle des temps géologiques. |
日期 | 2008年9月 (Version 1.1) |
来源 | Graham, Joseph, Newman, William, and Stacy, John, 2008, The geologic time spiral—A path to the past (ver. 1.1): U.S. Geological Survey General Information Product 58, poster, 1 sheet. Available online at http://pubs.usgs.gov/gip/2008/58/ |
作者 | United States Geological Survey |
其他版本 |
本文件衍生自: Geologica time USGS.png: |
Caption[编辑]
Original source: http://pubs.usgs.gov/gip/2008/58/geotimespiral_text.pdf
The Earth is very old—4.5 billion years or more according to scientific estimates. Most of the evidence for an ancient Earth is contained in the rocks that form the Earth's crust. The rock layers themselves—like pages in a long and complicated history—record the events of the past, and buried within them are the remains of life—the plants and animals that evolved from organic structures that existed 3 billion years ago.
Also contained in rocks once molten are radioactive elements whose isotopes provide Earth with an atomic clock. Within these rocks, "parent" isotopes decay at a predictable rate to form "daughter" isotopes. By determining the relative amounts of parent and daughter isotopes, the age of these rocks can be calculated. Thus, the scientific evidence from rock layers, from fossils, and from the ages of rocks as measured by atomic clocks attests to a very old Earth.
See USGS Fact Sheet 2007-3015 at http://pubs.usgs.gov/fs/2007/3015/ for ages of geologic time periods. Ages in the spiral have been rounded from the age estimates in the Fact Sheet. B.Y., billion years; M.Y., million years. For more information, see the booklet on Geologic Time at http://pubs.usgs.gov/gip/geotime/.
许可协议[编辑]
Public domainPublic domainfalsefalse |
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点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2012年7月6日 (五) 00:05 | 2,424 × 2,145(1.86 MB) | JohnnyMrNinja(留言 | 贡献) | Same image reduced from 6MB to 1.85MB. Removed unused transparency layer, indexed colors and increased compression, using en:GIMP. | |
2009年3月19日 (四) 22:04 | 2,424 × 2,145(6.03 MB) | Notyourbroom(留言 | 贡献) | Recropped my own version to have borders similar to the original upload. | ||
2009年3月19日 (四) 22:00 | 2,599 × 2,458(6.06 MB) | Notyourbroom(留言 | 贡献) | Much higher-res version (2599x2458@300DPI) cropped from the original PDF source. | ||
2008年12月29日 (一) 22:51 | 1,617 × 1,454(752 KB) | Mwtoews(留言 | 贡献) | {{Information |Description={{en|1=...}} |Source=USGS |Author=USGS |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> |
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