Now showing items 1-10 of 12
The Valborraz tungsten mine: Description of a potential source of arsenic pollution
(Universidade da CoruñaInstituto Universitario de Xeoloxía Isidro Parga Pondal, 2013)
[Abstract] Soil contamination levels were studied in the land affected by an abandoned tungsten mine in Valdeorras (NW Spain). The mine worked mainly in the first half of the twentieth century, and it was definitely closed ...
Contribution to the study of Fe-Ti mineralization from S. Torpes beach (Sines, Setúbal, Portugal)
[Abstract] Three samples from the natural heavy concentration of the upper back sands at S.Torpes beach was analysed by microscopy, MEV and microprobe in order to characterize the mineralogical composition of the ore ...
New data on the lithostratigraphy of Beiras Group (Schist Greywacke Complex) in the region of Góis-Arganil-Pampilhosa da Serra (Central Portugal)
[Abstract] In the course of geological surveys conducted in the region of Góis (Central Portugal) a new unit was recognized at the top of Boque-Serpins Formation, characterized by the presence of levels of quartzites ...
Assessing the soil physical characteristics of the gallery woods area at the hydrographic Mariana sub-catchment for environmental conservation
[Abstract] The objective of this work was to characterize soil physical properties of the gallery woods area at the hydrographic Mariana sub-catchment. The physical attributes evaluated were: bulk density, gravimetric ...
First data on testate amoebae in speleothems of caves in igneous rocks
[Abstract] The testate amoebae form part of the habitual troglobios in caves developed in igneous rocks (plutonic and volcanic) where the little light, the persistence of humidity, the availability of silica and organic ...
Catastrophes versus events in the geologic past: how does the scale matter?
[Abstract] Catastrophes were common in the geologic past, but their distinction from other events is necessary. Besides magnitude (strength), scales of events are important in a solution of this task. Several examples, ...
Geomorphological mapping of granite caves
[Abstract] The aim is to develop a mapping which represents the relief and the form (morphology) of granite caves and associated superficial structures.
Development trends of tafoni forms (incipient stages)
[Abstract] Forms called tafoni, diversified in different stages, are complex natural systems. The systematic register of their measurements is performed in order to infer relative ages and to use the results to reconstruct ...
Geological sketch and the non-karstic caves of the Bakony Mountains in Hungary
[Abstract] The about 4000 km2 Bakony Mountains form the most extensive region of the Trans-Danubien Mountains between Lake Balaton and Marcal River. They have a typical medium relief, including plateaux of various heights, ...
Growth and productivity of purging nut (Jatropha curcas L.) crop grown on an Oxisol in Tangará da Serra (MT, Brasil)
[Abstract] The purging nut (Jatropha. Curcas, L.) is a flowering plant, described as a poisonous, semievergreen shrub or small tree, which belongs to the family Euphorbiaceae. Cultivation is uncomplicated and the plant ...