Asymmetric rift interpretation of the western North American margin

V. L. Hansen, J. W. Goodge, M. Keep, D. H. Oliver

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Geologic evidence shows that the Neoproterozoic rift margin of western North America formed as a set of asymmetric detachments, leading to alternating upper- and lower-plate domains distinguishable by the width and gradient of the continental margin, thickness of overlying strata, uplift-subsidence history, relative structural complexity, and presence or absence of exposed lower-crustal rocks. The gradient of the cratonal margin is a key feature related to the transition between continental and oceanic crust. The sinuosity of the Cretaceous-Tertiary thrust-belt front, the distribution of basement exposures, and patterns of miogeoclinal deposition may therefore be inherited from the original asymmetric Neoproterozoic rift geometry. -from Authors

Original languageEnglish (US)
Pages (from-to)1067-1070
Number of pages4
Issue number12
StatePublished - Jan 1 1993


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