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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.


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In a lake without any considerable allochthonous input of inorganic matter, the minerogenic component of the sediments calculated from loss on ignition reflects the intensity of erosion in the catchment.
34]S distribution and range among the freshwater fishes suggest that both autochthonous and allochthonous (terrestrial C3 photosynthetic production and MDN) nutrient sources are important to the tidal freshwater fish community.
If we are interested in the distribution of allochthonous siliclastic matter in sedimentation processes, it is necessary to have for analysis purified material, that is the disaggregate flocs and sorbed materials (organics, carbonates, etc.
 
 
 
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