File:Jack Hills, Western Australia (Landsat 5 TM, 2009-07-14, detail).jpg

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Original file ‎(1,772 × 1,253 pixels, file size: 2.82 MB, MIME type: image/jpeg)

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Description
English: Contrast-enhanced true color satellite image (Landsat 5) of the Jack Hills in Western Australia. The rocks of the Jack Hills are very old (~ 3 Billion years) and belong to the so-called Yilgarn Craton. Yet some of these rocks, the Jack Hills conglomerate (actually a metaconglomerate) contain individual grains of zircon which are even older, more than 4 Billion years old. They are used by geoscientists to reconstruct the very early history of the earth.
Date (original acquisition date of the entire original Landsat 5 image tile; this slightly modified detail image was created on 28 August 2019)
Source

Own work

  • based on Landsat 5 imagery (Entity ID LT51130782009195ASA00), downloaded at USGS Earth Explorer, dataset Landsat Legacy: Global Land Survey (info);
  • The actual satellite image was combined with a hillshade layer, generated from SRTM-based (SRTM GL1, 30 m resolution) digital elevation model, retrieved from OpenTopography (http://opentopo.sdsc.edu/raster?opentopoID=OTSRTM.082015.4326.1), in order to make the image look more plastic.
  • combination of hillshade and satellite image and insertion of latitude, longitude, and scale bar, and export as .jpg were done with QGIS;
  • final editing was done with Adobe Photoshop
Author Gretarsson
 
This JPG graphic was created with QGIS.
 
This image was created with Adobe Photoshop.

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Only the first two versions are in the public domain because they represent NASA material that was modified/processed by (a) NASA employee(s) and was published on a NASA website, cf. PD-USGov-NASA.

File history

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Date/TimeThumbnailDimensionsUserComment
current19:42, 28 August 2019Thumbnail for version as of 19:42, 28 August 20191,772 × 1,253 (2.82 MB)Gretarsson (talk | contribs)originally uploaded version is factually wrong, for details see talk page
00:05, 30 December 2017Thumbnail for version as of 00:05, 30 December 2017348 × 261 (63 KB)Ras67 (talk | contribs)cropped
13:14, 22 June 2008Thumbnail for version as of 13:14, 22 June 2008350 × 263 (40 KB)Dhaluza (talk | contribs){{Information |Description={{en|1=Low and smoothed by erosion, the Jack Hills aren’t too impressive as a mountain range. But mineral crystals have weathered out of the Jack Hills and washed into streams, and these crystals tell a fascinating story about

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