thumbnail|vargeÃ£o dome - landsat vargeÃ£o dome is a meteorite crater in santa catarina state, brazil, straddling the municipalities of vargeÃ£o, faxinal dos guedes, and passos maia. the crater is an almost perfectly circular depression with steep walls, 12&nbsp;km in diameter and up to 225 m deep relative to its rim. it is of early cretaceous age. the meteorite impacted on the basaltic rocks of the serra geral formation (jurassic/cretaceous). the crater displays several concentric rings and radial faults, and an eroded central bulge. the latter consists of impact breccias and sandstones from the botucatu/pirambÃ³ia formation (cretaceous/triassic), which have been displaced about 700 m above their mean depth in the surrounding area. at least four post-impact lava flows have been identified between the rim and core. the impact origin of the structure is attested by the presence of shatter cones and shocked quartz grains. ==discovery and studies== in 1978, brazilian geologists a. paiva filho, c.a.v. andrade and l.f. scheibe  identified an anomalous circular structure in radar images produced by the radambrasil survey, and called it the vargeÃ£o dome. in the early 1980s e. barbour jr. and w.a.g. correa  studied the structure in detail, in the context of oil/gas surveys of the area, and proposed a volcanic/tectonic origin for the structure. in 1982, Ã. p. crÃ³sta and a. paiva filho identified it as an impact crater.{{cite conference | author = paiva fÂº, a. | coauthors = crÃ³sta,a.p.; amaral,g. | year = 1982 | title = utilizaÃ§Ã£o de dados de sensoriamento remoto no estudo estratigrÃ¡fico e estrutural da formaÃ§Ã£o serra geral (sul do
Cretaceous_impact_craters Earth_Impact_Database Impact_craters_of_Brazil