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→The Guarani Aquifer
==The Guarani Aquifer==
==The Guarani Aquifer==
[[file:Parana_2.jpg|300px|thumb|{{figure number|2}}The Guarani Aquifer location.]]
The Guarani Aquifer is located in the Paraná Basin in South America (Center-Southwest of Brazil, Northeast of Argentina, Northwest of Uruguay and Southeast of Paraguay) ([[:File:Parana_2.jpg|Figure 2]]). It is a mixed type of aquifer, porous and fractured, covering 1,200,000 km2.
The Guarani Aquifer is located in the Paraná Basin in South America (Center-Southwest of Brazil, Northeast of Argentina, Northwest of Uruguay and Southeast of Paraguay) ([[:File:Parana_2.jpg|Figure 2]]). It is a mixed type of aquifer, porous and fractured, covering 1,200,000 km<sup>2</sup>.
Deposition of the sandstone portions made the existence of the aquifer possible. The two sandstones units are the Piramboia Formation at the bottom and, most important, the Botucatu Formation at the top. During the Jurassic period a desert environment prevailed in this area, similar to the Sahara Desert today, depositing medium grained, well sorted, quartzose sandstones, red and rose in color.
Deposition of the sandstone portions made the existence of the aquifer possible. The two sandstones units are the Piramboia Formation at the bottom and, most important, the Botucatu Formation at the top. During the Jurassic period a desert environment prevailed in this area, similar to the Sahara Desert today, depositing medium grained, well sorted, quartzose sandstones, red and rose in color.