Master thesis presented by Diamantino Insua Pereira, 1990, 132 p.

Abstract
Sedimentological characterization of plio-quaternary and quaternary deposits, studding Folk-Ward statistics, pebble population, heavy minerals, quartz sand surface textures under SEM and clay mineralogy.
Sedimentological characteristics define 3 unites:

- Lower unity - essentially clay and silt with kaolinite domination. Silimanite, tourmaline and zircon abundant in heavy minerals and etched quartz by dissolution; sediments in discontinuous occurrence, resulting of the meteorization of the near substract; probably Pliocene.

- Median unity, conglomerate with thin intercalations of fine sediments. Gibsite dominating clay fraction; andalusite, tourmaline and zircon dominating in heavy minerals. Sediments deposited in four phases in high energy fluvial environment; conditions for strong meteorization before first and second phases, and less effects in sediments becoming after; this facts have better representation quantifying feldspar and pebble alteration and surface features of quartz in SEM.

- Upper unity, silty, zircon, tourmaline and rutile dominating heavy minerals, ilite dominating in clay fraction, dissolution and precipitation effects in quartz surface; deposition probably in final Wurm in cold environment.