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Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone with...

tephra. Red oxidized tephra beneath the black tephra was deposited by lava fountaining at the larger satellite cone. Tseax Cone was the source of four...

pronunciation: [ˈkʰvɛrˌfjatl̥] ; also known as Hverfell [ˈkʰvɛrˌfɛtl̥]) is a tephra cone or tuff ring volcano in northern Iceland, to the east of Mývatn. It erupted...

hydromagmatic activity occurred. Cinder cones and tuff cones formed during the late stage of activity. Tephra layers in ice cores drilled at Byrd Station...

cones are Alcyone Cone and Taygete Cone, the latter of which has been radiometrically dated to have erupted during the Holocene. A number of tephra layers...

Mount Bailey is a relatively young tephra cone and shield volcano in the Cascade Range, located on the opposite side of Diamond Lake from Mount Thielsen...

Butte, a volcanic field, lava domes, and cinder cones Mount Bailey (Oregon), a shield volcano and tephra cone Mount Mazama, a stratovolcano, shield volcano...

numerous times in the late Pleistocene and Holocene, forming widespread tephra deposits both in the proximity of Hudson and in the wider region. Four large...

a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile...

lava flow deposits, sits 1,000 feet (300 m) to the west of the first tephra cone. Variegated pyroclastic rock is embedded among these flows. Element abundance...

on the western side of the crater formed the 70 meter high Pu'u Pua'i tephra cone (Hawaiian for 'gushing hill'). On December 11, 1959, at the end of the...

eroded into rugged terrain. Pyroclastic eruptions then started to pile tephra into cones in the northern area of the park. Mount Tehama (also known as Brokeoff...

Another cinder cone La Angostura formed a peninsula separating the lakes Epulafquen and Huechulafquen. This cone has three craters. A tephra layer of black...

volcanic material (lava and tephra) that is deposited around the vent is known as a volcanic edifice, typically a volcanic cone or mountain. The most common...

cinder cones near the end of the explosive phase of activity. The last phase of explosive activity spread tephra to the north and east of the cones. The...

Wilderness Mount Washington Wilderness Pacific Crest Trail Shield volcano Tephra cone Willamette National Forest Oregon portal Pacific Northwest portal "Mt...

Sciences: 408–412. Heiken, G. (June 1978). "Characteristics of Tephra From Cinder Cone, Lassen Volcanic National Park, California". Bulletin of Volcanology...

pits on Mammoth Mountain and a set of cinder cones south of the mountain; the latter are called the Red Cones. Eruptions along the narrow fissure system...

Hveravellir 5,800 BC, Hveravellir 1000 BC - Hverfjall, (Hverfell) is a tephra cone or Phreatomagmatic eruption in northern Iceland. The eruption was in...

the tephra volume peaked at 5.8 x 106 m3 during this eruption period, resulting in the addition of about 50 meters of height to the cinder cone. The...