Lineamenti evolutivi del clima nell'area del Bacino del Fucino (Italia centrale) negli ultimi 100.000 anni

Abstract

 A reconstruction of the evolution of the climate in the area of the Fucino basin for the last hundred thousands years has bean attempted, by means of sedimentological and geochemical studies performed on the deposits drilled by a 40 m borehole in the middle of the drained lake bad. Three main intervals have bean singled out in the sedimentary sequence: two are characterized by higher organic matter and calcium carbonate contents and can be referred to palaeoclimatic phases with relatively higher moisture and temperature; the third, interlayered between the two, shows a decrease of organie matter and calcium carbonate contents and the clayey fraction largely prevailing over the silty one and can be interpreted as an arid phase with average temperature probably lower than the present. In the absence of detailed chronological data, only the age of the last climatic phase and that of the directly underlying sediments, referred respectively to the Holocene and ta the Pleniglacial, can be inferred by the stratighaphy.

The palaeoclimatie meaning of the indicators herein used has been pointed out through the comparisan with similar studies performed on lacustrine basins with different environmental (geological, morphological, idrogeological, etc.) characteristics.