What do we find at Convergent Subduction Zones (Ocean-Continent)?
• Compressional stress • Reverse Faults & Folds • Explosive Volcanoes (Intermediate compositionmixing of mafic ocean and felsic continent) • Volcanic Mountain Chains • Trenches found off shore • Currently occurs in the Northwest portion of North America (the Cascades Range exists because of the volcanic activity that forms volcanoes (Mt. Hood, Mt. Rainier, Mt. St. Helen’s, etc… or the upwelling magma warps the crust into mountainous terrain. • What do we find at Convergent Subduction Zones (Ocean-Ocean)? • Compressional stress • Reverse Faults & Folds • Explosive Volcanoes (Intermediate composition) • Island Arc Chains • Trenches found off shore • Currently forming the Aleutian Islands of Alaska,the islands of Japan, and the islands of Indonesia. • All of the above Island arcs are a part of the Pacific Rim of Fire • What do we find at Convergent Mountain Building Regions (Continent-Continent)? • Compressional Stress • Reverse Faults & Folds • One continent thrusts up over the other •
