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Датотека:North america and scandinavia basement rocks.png

North_america_and_scandinavia_basement_rocks.png ‎(484 × 429 piksela, veličina datoteke: 15 kB, MIME tip: image/png)

Opis 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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  • File:North_america_basement_rocks.png licensed with PD-USGov-USGS
    • 2005-09-16T15:47:59Z Saperaud 484x429 (13371 Bytes) [[North America]]n [[craton]]s 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 interio

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status autorskog prava Serbian (transliteracija)

zaštićeno autorskim pravima Serbian (transliteracija)

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1. april 2011

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trenutna23:34, 1. april 2011.Minijatura za verziju na dan 23:34, 1. april 2011.484 × 429 (15 kB)Bjoertvedt{{Information |Description=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 o

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