Adriatic Side Research Articles

Su alcuneCarexnuove per le Marche o per il versante adriatico della Penisola Italiana

Abstract About some « Carex » new for the Marche Region or for the Adriatic side of the Italian Peninsula. — We give information about the presence in the Marche region of six new or unpublished Carex in this district; they are: C. distachya Desf., C. Grioleti Roem., C. pallescens L., C. nitida Host, C. olbiensis Jord. and C. depauperata Good. Amongst them, we must consider C. Grioleti as new in the whole Adriatic basin, while C. nitida, C. olbiensis and C. depauperata result as new or unpublished in the whole Adriatic side of the Italian Peninsula, or in a good part of it. Information is given about the distribution and the ecology of every single species in this district; we linger especially over the C. Grioleti, for the particular importance and significance of this taxon.

Application de la methode des mineraux lourds a quelques problemes morphologiques des Abruzzes adriatiques

Abstract Heavy mineral analysis of samples from the Adriatic side of the Abruzzi mountains gives an indication of the age of the surface of the Gran Sasso plateaus and of the Quaternary continental formations. The absence of heavy minerals characteristic of the Pontian molasse suggests the possibility that the plateaus were never completely covered by the Pontian sea. The isolated molasse deposits which have been reported from the Gran Sasso may have been deposited in small gulfs along the shore of the sea. The Quaternary marine sediments have been dated by their fossil content. The majority of the Quaternary deposits, however, are gravels, breccias and eolian loams which contain neither fossils nor pollen. Cinder showers from Quaternary eruptions on the Tyrrhenian side of Abruzzi were carried by the wind and deposited volcanic minerals which were incorporated in the Quaternary material of the central Apennines. Heavy mineral analysis of the deposits containing these minerals reveals associations which provide a basis for determining the chronology of the Quaternary strata.