1.Previous
3.Next

dolomite; the central valley is underlain by Permian greywacke, conglomerate, and red sandstones; and the lower reaches pass over Triassic dolomite interbedded with marls and Cretaceous limestone breccia. This geology governs the river's chemistry: waters are of the HCO3?-Ca²+-Mg²+

1.Previous
3.Next