geologia

Background: Currently, palaeontology professors have been challenged to update and incorporate innovative teaching approaches into their planning to help students develop the necessary skills and competencies.

Early Warning Systems (EWS) are non-structural measures for landslides disaster prevention. They are based on the detection of impending failure signals. The results of a landslide simulation experiment where accelerometers were used to identify pre-failure signals are presented in this paper. Landslide was simulated in a tilting flume filled with sandy soil. During the experiment, the flume was fixed at 30° inclination and water percolated through the soil until it slid.

Formation and fragmentation of landmasses, such as the Nuna/Columbia and Rodinia supercontinents, are influenced by mantle plume activity during rifting and breakup. In the Borborema Province, NE Brazil, within-plate magmatism at ca. 1.6 and at ca. 0.8 Ga is evidenced by the formation of mafic-ultramafic volcanic and plutonic rocks, mafic-ultramafic layered intrusions, and A-type granite intrusions.

The Borborema Province hosts several Mn-rich metasedimentary sequences, containing up to 40 wt% MnO_(total). These sequences are composed of Mn oxide and Mn silicate lenses that alternate with spessartite quartzite layers. They are also spatially associated with graphite-bearing gneissic and granitic rocks.