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Previously unrecognized regional structure of the Coastal Belt of the Franciscan Complex, northern California, revealed by magnetic data

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Previously unrecognized regional structure of the Coastal Belt of the Franciscan Complex, northern California, revealed by magnetic data; 2013; Article; Journal; Geosphere; Langenheim, V. E.; Jachens, R. C.; Wentworth, C. M.; McLaughlin, R. J.

Summary

Magnetic anomalies provide surprising structural detail within the previously undivided Coastal Belt, the westernmost, youngest, and least-metamorphosed part of the Franciscan Complex of northern California. Although the Coastal Belt consists almost entirely of arkosic graywacke and shale of mainly Eocene age, new detailed aeromagnetic data show that it is pervasively marked by long, narrow, and regularly spaced anomalies. These anomalies arise from relatively simple tabular bodies composed principally of magnetic basalt or graywacke confined mainly to the top couple of kilometers, even though metamorphic grade indicates that these rocks have been more deeply buried, at depths of 5–8 km. If true, this implies surprisingly uniform uplift [...]

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Type Scheme Key
local-index unknown 70118531
local-pk unknown 70118531
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1130/GES00942.1
series unknown Geosphere

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citationTypeArticle
journalGeosphere
languageEnglish
parts
typevolume
value9
typeissue
value6
typePublication Place
valueBoulder, CO

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