 :this article is for the river in france. for the river in the haida gwaii archipelago in canada, see ain river (haida gwaii)  the ain is a river in eastern france. it gave its name to the ain departements. in the franco-provenÃ§al language it is known as the en. ==global position== the river rises at an altitude of some 700 metres, near the village of la faviÃ¨re, in the jurassic limestone of the southern end of the jura mountains and flows into the rhÃ´ne about 40 kilometres above lyon, some 190 kilometres down the ain. its source is in the old county: franche-comtÃ©. it flows south through the combined lengths of the two dÃ©partements of * jura (named after the mountains), and * ain (named after the river). on the way it passes through the towns of champagnole. (05Â°54'28"e 46Â°44'53"n) and pont-d'ain (05Â°20'13"e 46Â°02'56"n). the ain flows into the river rhÃ´ne, on the rhÃ´ne's right bank, opposite the village of anthon, approximately 40 km east of lyon.  ==geology== the river flows through two regions. the jura is, of course, jurassic but it includes less clay than the jurassic of england so upper or middle jurassic means limestone of some sort, possibly marl (eb 13). the lower river passes over holocene deposits from the river's own activity amongst rocks of the middle or upper pleistocene (cg). the jura consists of limestone strata crushed into ridges between the forces of the spreading rift valley of the saÃ´ne and the alps, the latter raised by a collision of the italian tectonic plate with europe. the highest ridge is the easternmost and the ain flows southwards in the lowest valley, which lies towards the western side of the jura. the westernmost ridge is again rather higher as the plain of the saÃ´ne valley is subducted below the jurassic rocks (dercourt). the whole has been glaciated but there is relatively little till rema
Geography_of_Ain Jura RhA'ne_basin Rivers_of_France Rivers_of_RhA'ne-Alpes