A walk in the Miocene Sea
|(CH 1903)||E 724052||N 73329||H 360.0|
|(WGS 84)||Long. 9.034||Lat. 45.800|
Hydromorphologie, Structural geology, Paleontology
The Sandstone of the Val Grande emerges in a band oriented northwest-southeast, between the inhabited areas of Parè and Grandate. In the Burdigalian Era (Early Miocene), a series of sandy submarine deposits were formed, caused by currents flowing from north to northwest. The predominant lithology is that of massive sandstones, in metric benches, often medium- to coarse-grained. The benches can have complete direct gradation, with thin laminations towards the top of the layer, or may be truncated. There are also conglomerate and pelite levels, often with traces of bioturbation and a well-represented fauna of molluscs and echinoidea. More generally, this geological formation belongs to the Gonfolite Lombard Group, a succession of marine conglomerates, sandstones, and marls, which forms the backbone of the hills between Como and Varese. Above and below, and in partial eteropia, the Sandstones of the Val Grande pass respectively to the conglomerates of Lucino, and to the pelites of Prestino.
From the center of Montano continue along Via Matteotti, then take Via Alessandro Volta. Follow the main road until you reach the village of Trivino, and leave your car there. From the town of Trivino, continue north and take the path on the right after about 250 metres.
Descend into the valley and continue along the river downstream. After 500 metres take the path on the right.