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allochthonous |
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allochthonous [ə′läk·thə·nəs] (ecology) Pertaining to organisms or organic sediments in a given ecosystem that originated in another system. (petrology) Of rocks whose primary constituents have not been formed in situ. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The black shales forming the
detached, imbricated allochthonous blocks can be subdivided into those
belonging to the Middle Cambrian and Upper Cambrian, with the highest
grades of mineralisation occurring in the Upper Cambrian black shales. The Dunnage Zone
of the Northern Appalachians, and Newfoundland in particular, contains
the remnants of several unrelated, thin, allochthonous, Iapetan oceanic
terranes. |
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