History of professional guidance in Argentina

Professional guidance has developed in Argentina since 1940, influenced by the guidance which in that time came from Spain, France, Belgium and Switzerland. The paper analyzes the first experiences in professional guidance, developed both in the great industrial cities as Buenos Aires and Rosario, and little urban centres as Tucumán or San Luis. The institutional and political context of such experiences is also analyzed, as well as the State's full support of them.

History of professional guidance in Argentina

Professional guidance has developed in Argentina since 1940, influenced by the guidance which in that time came from Spain, France, Belgium and Switzerland. The paper analyzes the first experiences in professional guidance, developed both in the great industrial cities as Buenos Aires and Rosario, and little urban centres as Tucumán or San Luis. The institutional and political context of such experiences is also analyzed, as well as the State's full support of them.

The petrology of the lower series volcanics of ODP Hole 104-642E

Between 1086.6 and 1229.4 m below seafloor at Site 642 on the Outer Vøring Plateau, a series of intermediate volcanic extrusive flow units and volcaniclastic sediments was sampled. A mixed sequence of dacitic subaerial flows, andesitic basalts, intermediate volcaniclastics, subordinate mid-ocean ridge basalt, (MORB) lithologies, and intrusives was recovered, in sharp contrast to the more uniform tholeiitic T-type MORB units of the overlying upper series. This lower series of volcanics is composed of three chemically distinct groups, (B, A2, A1), rather than the two previously identified. Flows of the dacitic group (B) have trace-element and initial Sr isotope signatures which indicate that their source magma derived from the partial melting of a component of continental material in a magma chamber at a relatively high level in the crust. The relative proportions of crustal components in this complex melt are not known precisely. The most basic group (A2) probably represents a mixture of this material with MORB-type tholeiitic melt. A third group (A1), of which there was only one representative flow recovered, is chemically intermediate between the two groups above, and may suggest a repetition of, or a transition phase in, the mixing processes.