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3. Pontina Plain, induding Circeo Mountain (Ppo): from the Torto River to
the north-west to the valley of the Amaseno River to the south-east, from the
slopes of the Albani Hills an d the Le pini Mountains to the north and north-east,
to the T yrrhenian Sea to the south-west an d south.
4. Mid-Tevere River basin, induding the Chiana V alley, the area ofT rasimeno
Lake, an d the Martani, Amerini an d Soratte Mountains (T ev): from Sansepolcro
to the north, to the confluence of the Farfa River to the south, between the ori-
entai slopes of Amiata, Vulsini, Cimini and Vicani Mountains to the west and
the western slopes of the U mbrian-Marchi gian Apennines and the valley of the
N era River to the east.
Volcanic sectors of the Tyrrhenian coast
5. Amiata Mountain (Ami), induding the Civitella, Labbro, and Cetona
Mountains and the adjacent reliefs: between the valley of the Orcia River to the
north, the valley of the Ombrone River to west, the Maremma to the south, and
the Chiana V alley an d the Paglia River to the east.
6. Vulsini Mountains (Vul): between the valley of the Paglia River (indud-
ing Rufeno Mountain) to the north, the valley of the Fiora River to the north-
west, the northren Lazio (Tuscia) to the south, and thevalley ofthe Tevere River
to the east.
7. Cimini and Vicani Mountains (Cim): between the valley of the Vezza River
to the north, the valley of the Mignone and Biedano Rivers to the west, the val-
ley of the Treia River to the south, an d the valley of the Tevere River to the east.
8. Tolfa Mountains (T o l): between the valley of the Mignone River to the north-
east and to the north-west, and the T yrrhenian Sea to the west and the south.
9. Sabatini Mountains (Sba): the hilly reliefs around the Bracciano,
Martignano and Monterosi Lakes, induding Baccano valley, between the valley
of the Treia River to the north, the Tolfa Mountains to the west, the Campagna
Romana to the south and the valley of the Tevere River to the east.
10. Albani Hills (Alb): between the Campagna Romana to the north and to
the west, the Lariano and Valmontone saddle to the south-east and the Pontina
plain to the south and the south-east.
Anti-Apennines
11. Lepini Mountains (Lep): between the Lariano and Valmontone saddle to
the north-west, the Pontina plain to the south-west, the valley of the Amaseno
River to the south-east, and the v.alley of the Sacco River to the north-east.
12. Ausoni-Aurunci Mountains (Aus): between the Latina Valley (Sacco and
Liri Rivers) to the north, the valley of the Amaseno River to the north-west and
west, the Tyrrhenian Sea to the south, and the valley the Garigliano River to the
east.

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