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Abstract
Variations in the ratio of K2O to SiO4 in andesitic rocks suggest early and middle Cenozoic subduction beneath the western United States along two subparallel imbricate zones dipping about 20 degrees eastward. The western zone emerged at the continental margin, but the eastern zone was entirely beneath the continental plate. Mesozoic subduction apparently occurred along a single steeper zone.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evolving subduction zones in the Western United States, as interpreted from igneous rocks |
| Series title | Science |
| Volume | 174 |
| Issue | 4011 |
| Year Published | 1971 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 821 |
| Last page | 825 |
| Google Analytic Metrics | Metrics page |