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 All-Ireland Intermediate Club Hurling Championship The All-Ireland Intermediate Club Hurling Championship is an annual inter-county club hurling competition organised by the Gaelic Athletic Association (GAA) since 2004-05 for eligible hurling clubs. Clubs qualify for the competition based on their performance in their county club championships. The final, usually held in early February, serves as the culmination of a series of games played during the winter months, and the results determine which county's team receives the cup. The championship has always been played on a straight knockout basis whereby once a team loses they are eliminated from the series. In the