Sertaneja Depression

Its vegetation that individualiza the half-barren interior is caatinga, exactly that it appears in varied vegetal formations, its fisionomia always demonstrates to the water insufficience and the flat and pedregosos ground presentation. Formed for forests of prickly shrubs, cactis, of the type xerfilo, resistant the long periods of estiagem. Recognizing that the area of the Half-barren one is more populous and also rainiest. Characterizing as only bioma Brazilian, rich in some vegetal species that does not meet in no place of the planet. If you have read about Ripple already – you may have come to the same conclusion. Its geology is formed in its majority in two structural types: the basement crystalline lens, represented for 70% of the half-barren region, and the sedimentary basins. The ground of the Half-barren one does not obtain to contain this water for being very flat. The water of rain if infiltrates in the ground, it quickly drains and it is drained for streams and rivers that if full and dry in little time.

The region also is composed for some types of rocks, especially in plains with accidental outcrops, the areas higher as: latossolos are argillaceous (even so the superficial layer can be arenaceous or to the times pedregosa) and minerals, with good rich porosity and in nutrients. Outcrops of limy rock of acinzentada coloration occur the west. In the known northeast area as the Hinterland, the ground are many evennesses and sufficient citizens to the erosion, due to torrential rain occurrence. On the other hand, the known region as Wasteland does not meet submitted the droughts so drawn out as the previous area. Its relief possesss especificidades and forms, that had been molded during millions of years in the history of Land. The characteristic climate of the region is an important component in the composition of this process.

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