Monthly Archives: February 2009

9. Mining

Posted on 27/02/2009 by Vitor Pacheco

9.1 PRIMITIVE EXTRACTION I include under mining all human activities concerned with the extraction of inert natural materials. As such, the extraction of stone for construction, is mining, and at the beginning, perhaps the easiest was the excavation in relatively soft … Continue reading →

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8. Prospecting

Posted on 20/02/2009 by Vitor Pacheco

8.1 GRASS ROOTS Grass roots exploration is the general term for the very initial stage of prospecting that starts from a zero base, that is, neither geological maps, nor aerial photos are available, and often not even topographic maps. Of … Continue reading →

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7. Structure and Metamorphism

Posted on 11/02/2009 by Vitor Pacheco

7.1 General As mentioned in the introduction, faulting, folding and metamorphism are a consequence of the movement of the plates that form the earth’s crust, and these plate movements encompass huge areas, developing topographical features with spectacular characteristics, particularly noticeable … Continue reading →

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6. Sedimentation

Posted on 08/02/2009 by Vitor Pacheco

For the majority of cases, rocks are fragmented by erosion and\or weathering  and transported elsewhere. Sedimentation is the processes to which these materials termed clasts, are subjected to until they are deposited, and the main mechanisms involved are presented in … Continue reading →

Posted in Geology, Sedimentary Rocks | 2 Comments