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This paper presents zircon U-Pb, REE and Hf data for Paleoproterozoic felsic volcanic rocks from the Colíder Group with outcrops in the southwestern Amazonian Craton. It is estimated that these rocks cover an area of 85,000 km² with a volume of 2.7 × 10⁶ km³. The Colíder volcanics are comprised of basalts, andesites and a variety of felsic rocks. The felsic rocks are characterized by rhyolite, andesite and dacite lavas with frequent intercalated pyroclastic and epiclastic deposits. Effusive and pyroclastic rocks are intruded in places by hypabyssal porphyritic rocks. The U-Pb ages obtained for the northeastern domain (1782–1776 Ma) are younger than the ages obtained for the southern domain (1800–1787 Ma). The NE volcanic facies show Hf T_DM ages between 2.3 and 2.5 Ga (ε_Hf from +1 to −3) and greater fractionation (Ce/Yb – 0.03–0.06) than the younger facies that has T_DM from 2.4 to 2.7 Ga (ε_Hf from −3 to …