The Marysvale volcanic field is located in southwestern Utah, United States. One of the largest volcanic fields in the western United States, the Marysvale straddles the Colorado Plateau-Great Basin transition zone. Most igneous rocks belong to a middle Cenozoic (~32 to 22 million years old) calc-alkaline sequence, although about 5% are related to an upper Cenozoic (23 million years to Holocene) bimodal (basalt and rhyolite) sequence. The Marysvale contains a variety of volcanic features, including stratovolcanoes, calderas, lava domes, and cinder cones. The field is an example of intraplate volcanism; its earlier deposits are thought to be related to Farallon plate subduction, while the later bimodal assemblage (especially the basalts) have been linked to Basin and Range extension. Notable calderas See also Geology of the Bryce Canyon area Large volume volcanic eruptions in the Basin and Range Province Tushar Mountains, Delano Peak References Volcanic fields of the Great Basin section Volcanic fields of Utah Holocene volcanoes Miocene volcanoes Oligocene volcanoes Pleistocene volcanoes Pliocene volcanoes Landforms of Piute County, Utah Landforms of Sevier County, Utah Holocene North America Miocene North America Oligocene North America Pleistocene North America Pliocene North America Paleogene United States Neogene United States Quaternary United States Calderas of Utah