Editing Geography of Italy (section)

===Hills===
[[File:Uliveti monte cinto.JPG|thumb|[[Euganean Hills]]]]
The hills cover most of the Italian territory. They are mainly located in the central-southern part of the peninsula,<ref name=Colline>{{cite book|first=Gianfranco|last=Bresich|title=Iperlibro|publisher=Deagostini|year=2005|isbn=88-418-2169-8|page=252|language=it}}</ref> along the sides of the Apennine ridge, but also in the pre-Alpine area, close to the Alps.<ref name=Colline />

The hilly reliefs, which alternate with hollows and valleys, have slight slopes and do not exceed {{convert|800|meters|disp=or}}.

The first two hilly systems are the subalpine hills and the Preappennino, two hilly strips arranged between the Alps and the Po Valley and between the Apennines and the Adriatic coast respectively.<ref name=Colli>{{cite book|first=Antonio|last=Londrillo|title=Alla scoperta della mia regione|publisher=Bulgarini|year=2004|isbn=88-234-2327-9|language=it|page=20}}</ref> The subalpine hills widen more in the western part of the Po Valley, where they form the hills of the [[Langhe]] and [[Montferrat]].<ref name=Colli /> Two other hill systems are the Tyrrhenian Anti-Apennine, which extends from the [[Colline Metallifere]] of Tuscany to [[Mount Vesuvius|Vesuvius]] and the Beneventane Hills in Campania, and the Adriatic Anti-Apennine, present in Puglia with the [[Altopiano delle Murge|Murge]] and [[Gargano]] hills.<ref name=Colli />

The Italian hills have different origins:

* The Langhe, Monferrato, [[Chianti (region)|Chianti]] and Murge are sedimentary hills<ref name=Colline /> formed by the lifting of the seabed.
* The Beneventane Hills are of tertiary formation, that is, composed of gravel stratifications or masses of pebbles mixed with limestone and sandstone, probably due to the raising of the lake bottom.
* The hills of [[Brianza]], of [[Canavese]] and more generally of the entire strip that runs at the foot of the Alps are morainic,<ref name=Colline /> that is, made up of deposits of earth and crushed stone transported by ancient glaciers.
* The [[Euganean Hills]] and numerous other formations in Tuscany, Lazio, Campania are of volcanic origin,<ref name=Colline /> i.e. they are the remains of ancient extinct volcanoes, rounded by a long erosion.