The Serchio (anc. Auser), which joined the Arno at Pisa in ancient times, now flows into the sea independently.
Of these the most remarkable is the group between the valleys of the Serchio and the Magra, commonly known as the mountains of Carrara, from the celebrated marble quarries in the vicinity of that city.
The Elsa and the Era, which join it on its left bank, descending from the hills near Siena and Volterra, are inconsiderable streams; and the Serchio, which flows from the territory of Lucca and the Alpi Apuani, and formerly joined the Arno a few miles from its mouth, now enters the sea by a separate channel.
The springs are situated in the valley of the Lima, a tributary of the Serchio; and the district is known in the early history of Lucca as the Vicaria di Val di Lima.
In the valley of the Serchio, 3 m.
Shelley's "The Boat on the Serchio," 117, "woods of stunted fir" for "pine" which the rhyme requires; Prince Athanase, 250, "And sea buds burst beneath the waves serene" for "under."
Above the level of the sea, in the valley of the Serchio, and looks out for the most part on a horizon of hills and mountains.
The river Serchio affords water-power for numerous factories.
The most important industries are the manufacture of jute goods (carried on at Ponte a Moriano in the Serchio valley, 6 m.
The ancient Luca, commanding the valley of the Serchio, is first mentioned as the place to which Sempronius retired in 218 B.
The road to Parma given in the itineraries, according to some authorities, led by Luna and the Cisa pass (the route taken by the modern railway from Sarzana to Parma), according to others up the Serchio valley and over the Sassalbo pass (0.