Fail:North america basement rocks.png

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North_america_basement_rocks.png ‎(484 × 429 piksel, saiz fail: 31 KB, jenis MIME: image/png)

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North American cratons and basement rocks.

As radiometric ages were determined for the shield-like rocks on the continents which were either exposed at the surface, underlay the flat rocks, or were within the interior of the mountain belts, patterns of age intervals were determined. These old rocks have been called the "basement". This has been interpreted to mean that the continents had somehow grown by development of rock assemblages with these characteristic age parameters. The expanding continental nuclei are part of the "craton" which consist of both exposed and buried basement rocks.
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Sumber http://rst.gsfc.nasa.gov/Sect2/14strprv.jpg or http://instruct.uwo.ca/earth-sci/300b-001/14strprv.gif English Wikipedia, original upload 22 April 2005 by Berkut Originally uploaded by User:SEWilco as Image:North america basement rocks.jpg. Replaced when this better version found.
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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derivative works

Derivative works of this file:  North america and scandinavia basement rocks.png

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North American cratons and basement rocks

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Kraton

basement Inggeris

Sejarah fail

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Tarikh/WaktuGambar kenitUkuranPenggunaKomen
semasa22:48, 11 Oktober 2019Gambar kenit bagi versi pada 22:48, 11 Oktober 2019484 × 429 (31 KB)CiaurlecReverted to version as of 21:20, 29 September 2019 (UTC)
13:52, 30 September 2019Gambar kenit bagi versi pada 13:52, 30 September 2019484 × 429 (37 KB)CiaurlecReverted to version as of 19:38, 29 September 2019 (UTC)
21:20, 29 September 2019Gambar kenit bagi versi pada 21:20, 29 September 2019484 × 429 (31 KB)CiaurlecMajor colour change to make conform to Geologic time scale where possible. Used also some other graphic changes as in File:North america and scandinavia basement rocks.png 2nd upload
19:38, 29 September 2019Gambar kenit bagi versi pada 19:38, 29 September 2019484 × 429 (37 KB)CiaurlecMajor colour change to make conform to Geologic time scale where possible. Used also some other graphic changes as in File:North america and scandinavia basement rocks.png
15:47, 16 September 2005Gambar kenit bagi versi pada 15:47, 16 September 2005484 × 429 (13 KB)Saperaud~commonswikiNorth American cratons and basement rocks. As radiometric ages were determined for the shield-like rocks on the continents which were either exposed at the surface, underlay the flat rocks, or were within the interior of the mountain belts, patte

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