Composition of the ancient north American crust

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Abstract. Geochemical studies of Wyoming Precambrian graywackes derived from continental crust older than 3.2 × 109 years indicate that their source area was at least as highly differentiated as most younger Precambrian crust. The composition of this early crust (approximately that of calcium-rich granite) is not unlike that of the 2.5 to 3.2 × 10 9 year old North American crust, Limited geochemical data suggest that the composition of North America may not have changed significantly during the last 3.0 to 3.5 × 109 years.

LanguageEnglish
Pages1015-1017
Number of pages3
JournalScience
Volume155
Issue number3765
Publication statusPublished - 1967
Externally publishedYes

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crust
Precambrian
continental crust
granite
calcium
North America
young

Cite this

Condie, Kent C. / Composition of the ancient north American crust. In: Science. 1967 ; Vol. 155, No. 3765. pp. 1015-1017.
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Condie, KC 1967, 'Composition of the ancient north American crust', Science, vol. 155, no. 3765, pp. 1015-1017.

Composition of the ancient north American crust. / Condie, Kent C.

In: Science, Vol. 155, No. 3765, 1967, p. 1015-1017.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Condie, Kent C.

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Y1 - 1967

N2 - Abstract. Geochemical studies of Wyoming Precambrian graywackes derived from continental crust older than 3.2 × 109 years indicate that their source area was at least as highly differentiated as most younger Precambrian crust. The composition of this early crust (approximately that of calcium-rich granite) is not unlike that of the 2.5 to 3.2 × 10 9 year old North American crust, Limited geochemical data suggest that the composition of North America may not have changed significantly during the last 3.0 to 3.5 × 109 years.

AB - Abstract. Geochemical studies of Wyoming Precambrian graywackes derived from continental crust older than 3.2 × 109 years indicate that their source area was at least as highly differentiated as most younger Precambrian crust. The composition of this early crust (approximately that of calcium-rich granite) is not unlike that of the 2.5 to 3.2 × 10 9 year old North American crust, Limited geochemical data suggest that the composition of North America may not have changed significantly during the last 3.0 to 3.5 × 109 years.

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