Spinning droplets - a conspicuous lapilli-size structure in kamafugitic diatremes of southern goiás, brazil
Revista Brasileira de Geociências(1999)
摘要
Kamafugitic lavas, dykes and diatremes occur in the Aguas Emendadas Region, southern Goias, forming part of the Late-Cretaceous Rio Verde-Ipora Igneous Province. A variety of lapilli-sized juvenile fragments occurring in the matrix of diatreme-facies breccias were recognised. These include armoured lapilli, frozen droplets and spinning droplets. This work describes the spinning droplets and proposes a model for their formation in diatrene environments.
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关键词
diatreme,lapilli
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