The relation between magmatic cycles and orogenic epochs
By: Umbgrove, J. H. F
.
Material type: 
ArticleDescription: 444-450p.Subject(s): Structure of the crust | Structure of the earth | Relations - Magmatic cycles - Orogenic epochs
In:
Geological magazine : Vol. 76 Iss. 1-12 Year. 1939Summary: Extract
Holmes, Kossmat, and Hess have independently pointed out that basic to ultrabasic rocks are characteristic of the axes of geosynclines, whereas acid rocks do not occur at that stage of development. Conversely, acid intrusives enter after the contents of the geosyncline have been folded. A short time ago an exhaustive summary of this subject was given both by Bucher and Rittmann.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Article
|
Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002566_72 | ||
Serials/Scientific Journal
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Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Available | 002566 |
Extract
Holmes, Kossmat, and Hess have independently pointed out that basic to ultrabasic rocks are characteristic of the axes of geosynclines, whereas acid rocks do not occur at that stage of development. Conversely, acid intrusives enter after the contents of the geosyncline have been folded. A short time ago an exhaustive summary of this subject was given both by Bucher and Rittmann.
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