|(CH 1903)||E 707145||N 73102||H 265.0|
|(WGS 84)||Long. 8.817||Lat. 45.801|
Stratigraphie, Structural geology
In Valle della Fornace, a small valley situated to the east of Lake Varese, important evidence of the environment and palaeogeography of the Pliocene Epoch has been preserved. In fact, marine deposits from the early Pleistocene were truncated by a glacial advance, which can be considered as the first glaciation affecting the Lombardy region. This event is particularly important as, from the interpretations so far proposed, it took place before the Pleistocene geological period to which the glacial advances are traditionally ascribed. The sequence consists of marine or marginal marine formations, such as the Clays of Castel di Sotto and the Formation of Valle della Fornace (see the cited literature for detailed descriptions of the geological units), both rich in macro-remains (flora and fauna) typically belonging to the Lower Pliocene. These deposits were then broken off by a glacial advance (the Formation of Vivirolo and the Formation of Boderi) of the Upper Pliocene, as evidenced by a proglacial lake which subsequently gave way to a flat fluvioglacial plain of the braided type. The entire sequence is affected by deformations such as folding, faulting and liquefaction.
Access to Valle della Fornace is located in Via dei Boderi in Varese, between the town and its homonymous lake. From the motorway, take the A8 to Varese, then follow the signs for Capolago and Cartabbia. It is recommended that you park your car at the cemetery in Via Torquato Tasso, then continue on foot in Via dei Boderi.
After about 400 metres, the road crosses a stream. Continue upstream to enter Valle della Fornace. It is advisable to wear boots.