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Belonging to the Pleistocene is a large formation of aeolic origin that reaches an altitude of m and is supported by rocks of the Palermo Formation.
The deposits and processes generated in the alluvial fans began earlier than this older coastal deposits and therefore the subsurface rudaceous deposits show lower sea level than the present one. This morphology is due to deposit and erosion processes characteristic of alluvial eknitiro.
One part of this deposit began as a barrier island during a period of marine transgression. To the east of this assemblage, lakes can be found, partially filled with peat.
Lacustrine deposits frequently appear as surface sediments, consisting of peat, ranging in thickness from 1 to 4. It is situated in the northeast of the area under investigation.
This document is only for private use for research and teaching activities. The sequence of deposits makes it possible to define the recurrence of both the marine and continental processes.
The deposits are found mainly in the proximal and medial areas of the fans. Rudaceous deposits are also found on the subsurface, covered over with coastal marine deposits, corresponding to the higher sea level of overyears ago. The remainder was added in the regressive period that followed, giving rise to beach ridges varying in height from 14 to 16m.
Sedimebtar and estuary deposits in certain stretches and situations are covered by lacustrine deposits, running parallel or perpendicular to beach ridges sandy bodies from various ages. There seem to have suuio two major periods of aeolic activity: Learn what derived works are clicking here.
Sandy beach deposits are from varying ages of the Pleistocene and Holocene and cover areas of two river basins. The rock formations appear in the form of scarps and residual elevations and underlie the Cenozoic sediments that cover the greater part of the area under investigation.
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Some deposits, with samples of trunks, shells and peat, mainly lagoonar, estuary and lacustrine deposits, could be dated by ‘C POT. Any uses or copies of this document in whole or in part must include the author’s name. These sediments consist of various deposits that originated under different conditions and environments and are distributed from the foot of the scarp of the “Serra Geral” General Range to the Atlantic Ocean.
They are bound on the east by another Pleistocene set of beach ridges and dunes Barrier lllcorresponding to a higher sea level ofyears ago and followed by a third formation Barrier lV with an aeolic covering and containing active dunes from the Holocene.
These deposits have a flat top and are slightly inclined to the east. They have a lobe morphology with a convex top, separated by low flat areas. They consist of rudaceous deposits, interspersed in some areas, and nearly always covered with finer-grained material. The distal deposits of the fans have a very slight representation.