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.
References in periodicals archive ?
The ([delta][sup.13]C range among the resident freshwater fishes suggest, not surprisingly, that both autochthonous and allochthonous production contribute to carbon fixation in this tidal freshwater stream.
These papers clearly demonstrated the allochthonous character of ophiolites and emphasized their diversity along the same orogenic belt.
Thus, unless there are inputs of allochthonous materials, an organic-mineral soil cannot form and almost pure organic matter accumulates directly on the limestone (slabs or massive outcrops) or between calcareous gravels (rock fragments or slope colluvia).
Therefore, experimental manipulation of terrestrial detrital inputs over multiple years represents an approach that allows assessment of terrestrial-aquatic linkages between allochthonous detritus and animal communities at the ecosystem level.
Likewise, none of the inferred possible klippen (Big Hill, Beinn Bhreagh, Murray Mountain) display any expression in the gravity data, also suggestive of an allochthonous nature for these blocks.
The first hypothesis considers all Patagonia, including the Somuncura Massif, to be allochthonous with respect to Western Gondwana during Paleozoic times (see Ramos 1984, 2008 for a review of these studies).
This frontal thrust brings to the surface allochthonous Cambrian to Quaternary sedimentary units which have been thrusted southward over Quaternary deposits of autochthonous foreland basin (Crawford 1974; Seeber and Armbruster 1979).
Lithologically, the allochthonous unit is mostly composed of sandstone, siltstone, greensand, siliceous mudstone, argillaceous micritic limestone, and rare coal measures, along with dispersed organic matter.
Develop new alluvial forests with Alnus glutinosa and Fraxinus excelsior through the transformation of allochthonous forests and the development of alluvial habitat types on agricultural land through integration of these areas into the river dynamics; and