Tiber Valley Explained

The Tiber Valley (Italian: Valle del Tevere) is the largest geographical part of the ^[1] of the Tiber river included in the Emilia-Romagna, Tuscany, Umbria, and the Lazio regions; it is characterized by river terraces and floodplain areas that extend from the Apennine belt up to the delta of the Tiber river in the of the Tyrrhenian Sea.

Geology

The Tiber basin is made up of four main morpho-structural environments:^[2]

• the upper Tiber basin, composed mainly of terrigenous sediment in flysch facies of Tuscan origin (on the right bank north of Lake Trasimeno) and Umbria-Marche (on the left bank)
• the Apennine carbonate ridge, which occupies the eastern and southern sector, made up of carbonate reliefs;
• the Tiber graben with its marine to continental facies deposits, the intermountain basins;
• the volcanic systems of the Volsini Mountains, Cimini, Sabatini and Alban Hills, which occupy the southwestern sector.

Graben

• Paleotevere Graben^[3]
• Paglia-Tevere Graben^[4]
• Tiber Graben (Chiana Valley)^{[5] [6]}

Territory and environment

Protected natural areas

• Tiber River Park - Umbria Region^[7]
• Interregional Tiber River Park^{[8] [9] [10]}
• Delta of the Tiber - Litorale Romano State Nature Reserve^{[11] [12]}

Notes

1. Web site: Information on the basin . it. Autorità di Bacino del fiume Tevere.
2. Web site: Autorita' Bacino del Tevere: LINEAMENTI GEOLOGICI DEL BACINO DEL TEVERE. it.
3. Web site: PaleoTevere . it. 2022-01-02.
4. Web site: Il Pliocene e il quaternario della Media valle del Tevere. it.
5. Web site: BACINO DEL TEVERE (Graben del Tevere, valle del Chiani) pag 189. it.
6. Web site: LINEAMENTI GEOLOGICI DEL BACINO DEL TEVERE. it.
7. Web site: Regione Umbria: Parco Regionale del Fiume Tevere .
8. Web site: Parco Fluviale Interregionale del Tevere . 15 February 2019 .
9. Web site: "Parco Interregionale del Fiume Tevere" Accordo di pianificazione sistema narnese ternano, Comuni di Otricoli e Calvi dell'Umbria, Pag 4 .
10. Web site: Proposta di legge regionale n. 160 del 18 aprile 2014 concernente: "Istituzione del parco fluviale regionale del Tevere". .
11. Web site: 26 October 2021 . it . Riserva Litorale Romano Riserva Litorale Romano .
12. Web site: 26 October 2021 . it-it . Centro Habitat Mediterraneo Ostia - Lipu Onlus .

See also

• Valtiberina