Archean felsic volcanic rocks in felsic rocks. Timing of felsic volcanism and tectonic constraints can be identified by radiometric dating and isotopic analysis. In Archean, underwater eruptions of felsic lava were common. Submarine eruption is evident by coarse volcanic breccia formed in situ, hyaloclastite or underwater pyroclastic deposits (clastic rock, composed of tephra only). Since felsic magma is viscous, volcanic eruptions that form dacite or rhyolite are explosive and violent. The Archean felsic eruption may be assigned to Vesuvius eruption type in the present day. Submarine rhyolitic flows were widespread in Archean but it is uncommon in the modern volcanic environment. Viscous felsic eruption
All-Ireland Intermediate Club Hurling Championship the creation of an All-Ireland series at intermediate level was a natural progression. The Munster Council were the first to organize a provincial championship in the intermediate grade in 2003. They were followed by the other three provincial councils in 2004, with the four champions contesting an All-Ireland series. Kildangan of Tipperary were the first All-Ireland champions after defeating Carrickshock of Kilkenny. The championship has been dominated by Kilkenny clubs, with Dicksboro, St. Lachtain's, Clara, Rower-Inistioge and Bennettsbridge claiming All-Ireland titles. Dicksboro are the only team to have qualified for two All-Ireland finals. In 2007, London club Robert Emmetts became