Датотека:North america basement rocks.png

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North_america_basement_rocks.png ‎(484 × 429 piksela, veličina datoteke: 31 kB, MIME tip: image/png)

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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.

Datum

5. mart 2015.

Izvor

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.

Autor

USGS

Dozvola
(Ponovno korišćenje ove datoteke)

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

Istorija datoteke

Kliknite na datum/vreme da biste videli tadašnju verziju datoteke.

	Datum/vreme	Dimenzije	Korisnik	Komentar
trenutna	00:48, 12. oktobar 2019.	484 × 429 (31 kB)	Ciaurlec	Reverted to version as of 21:20, 29 September 2019 (UTC)
	15:52, 30. septembar 2019.	484 × 429 (37 kB)	Ciaurlec	Reverted to version as of 19:38, 29 September 2019 (UTC)
	23:20, 29. septembar 2019.	484 × 429 (31 kB)	Ciaurlec	Major 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
	21:38, 29. septembar 2019.	484 × 429 (37 kB)	Ciaurlec	Major 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
	17:47, 16. septembar 2005.	484 × 429 (13 kB)	Saperaud~commonswiki	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, patte