André Hubert Dumont (15 February 1809 – 28 February 1857) was a Belgian geologist.

Dumont was born in Liège. His first work was a masterly Mémoire on the geology of the province of Liège published in 1832. A few years later he became a professor of mineralogy and geology and afterwards Rector of the University of Liège. He subsequently turned his attention to the mineralogical and stratigraphical description of the geological formations in Belgium. The names given by him to many subdivisions of the Cretaceous and Tertiary have been adopted.

His Mémoire sur les terrains ardennais et rhénan de l'Ardenne, du Brabant et du Condroz (1847-1848) is notable for the care with which the mineralogy of the strata was described, but the palaeontological characterization was insufficient, and neither did he adopt the terms Silurian or Devonian.

During twenty years he laboured on a geological map of Belgium (1849). He spared no pains to make his work as complete as possible, examining -- on foot -- almost every area of importance in the country. Journeying to the more southern parts of Europe, he investigated the shores of the Bosphorus, the mountains of Spain and other regions, thereby collecting material for his geological map of Europe. This latter work of outstanding scholarship was one of the first serious attempts to establish the regional-scale geological correlation between the various countries of Europe.

Xavier Rudd is an Australian singer, songwriter and multi-instrumentalist. He was born in 1978 and grew up in Torquay, Victoria. He attended St. Joseph's College, Geelong.

He has developed a strong reputation for playing live performances at musical festivals and concerts in Australia North America and throughout Europe. His following is particularly strong in Australia and in Canada, where he has recorded several albums.

Many of Rudd's songs incorporate socially conscious themes, such as environmentalism and the rights of Aboriginal peoples. In addition to playing the yidaki in many of his songs, he has also included both Australian and Canadian Aboriginal vocals in some of his songs.

Rudd has become a fixture at music festivals worldwide including the Bonnaroo Music Festival, the High Sierra (2004 & 2007) and the Wakarusa (2005), moe.down (2003), Summer Sonic, Lowlands, Rock Werchter among others. He has performed on tour with Jack Johnson, Dave Matthews, Ben Harper, Good Old War, G. Love & Special Sauce, and Rodrigo y Gabriela.^{[citation needed]}