[Mineralogy of some soils of different kind of material in Cuenca Alta and Media of Rio Motatan. States of Merida and trujillo. Venezuela]
1981
Ochoa, G. | Malagon, D. (Universidad de Los Andes, Merida (Venezuela))
English. In the upper middle Motatan basin, Venezuelan Andes, 14 soil samples were analyzed from a mineralogical view. Kaolinite was found to be the main component for clays located above 1000 meters, whereas very altered minerals predominated in the sand fraction of these soils over 3200 meters no marked mineral was apparent in the clay fraction; however, there were sands integrated essentially by rocky fragments, quartz, feldspar and biotite.
Show more [+] Less [-]Italian. Si sono studiati 14 suoli localizzati nella valle alta e media del fiume Motatan, regione Merida, Trujillo, Venezuela in diverse formazioni geologiche. La mineralogia predominante delle argille nella zona superiore a 1000 m, e la caolinite, sia ereditata che di sintesi. Nella frazione sabbiosa predominano i minerali piu alterati, fitoliti e frammenti litici. Nel suolo situato ad altezza superiore a 3200 m, non c'e predominanza di alcun minerale nella frazione argillosa; nella frazione sabbiosa dominano frammenti litici, quarzo, feldspato e biotite alterata.
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