Walking among the stone giants
Antica Via Regia
|(CH 1903)||E 728616||N 76096||H 660.0|
|(WGS 84)||Long. 9.094||Lat. 45.824|
Mineralogy / petrology
Along the way you can see several boulders, left by the Abduano Glacier, which came down from the North during the Quaternary Period. These are rocks of ghiandone granodiorite, serpentine and mica schists from Valtellina which were carried by the glacier in its slow descent to the south, and were finally abandoned along the way as the glacier withdrew and melted. Geologists have reconstructed the maximum height reached by the glacier which occupied the valley, as well as accurately mapping all the erratic boulders present on the valley slopes. The glacier reached the considerable altitude of 750 metres above sea level at Brunate. The local bedrock is essentially constituted of hemipelagic marly limestone (Moltrasio Limestone) of the Sinemurian Age (196 to 189 million years ago). It looks like a dark limestone, in flat, parallel layers 20 to 30 centimetres in thickness, with frequent nodules of black flint. It is usually poor in fossils, but at a house in “Mountains of Cazzanore” there is the recognizable imprint of a rare ammonite in one of the stones of a wall.
A funicular climbs from Como to Brunate, providing a spectacular panorama. At the station, go down the stairs and exit through the turnstile, continuing down to the paved road. Continue to the right towards San Maurizio. After 50 metres, at the CAMPARI fountain, take Via Nidrino on the left, going slightly downhill. Continue down until the sports field and, passing it on the right, take the path entering the woods towards the north.
Go along the path, and after about 50 minutes there is a turning on the right which leads to the Nairola Stone in about 20 minutes.