By ExploreNow Editor, on May 8th, 2012%
Volcano Type: Stratovolcano
Volcano Status: Radiocarbon
Last Known Eruption: 1900 BC ± 150 years
Summit Elevation: 1032 m 3,386 feet
Latitude: 56.552°N 56°33’9″N
Longitude: 158.785°W 158°47’5″W
 Black Peak The highly eroded stratovolcano and lava dome complex of Black Peak was constructed within an ice-free mid-Holocene caldera with two small caldera lakes on the northern and eastern sides. The pre-caldera volcano consists of andesitic-dacitic lava domes, lava flows, and volcaniclastic rocks that were constructed over a basement of Pliocene volcanogenic sedimentary rocks. Ash-flow tuffs and block-and-ash-flow deposits from the >10 cu km caldera-forming eruption, which occurred less than about 4000 years ago, fill the Ash Creek and Bluff Creek valleys to the west and north to depths of as much as 100 m. Most of the 3.5-km-wide caldera floor is occupied by a complex of nested dacitic lava domes and associated lava flows centered in the southern part of the caldera.
Click Here For The Rest Of Black Peak, Alaska, USA
Originally posted 2010-09-03 11:46:53.
By ExploreNow Editor, on May 3rd, 2012%
Volcano Type: Complex volcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 5401 m 17,720 feet
Latitude: 25.42°S 25°25’0″S
Longitude: 68.58°W 68°35’0″W
Cerro Bayo is a complex volcano of partial Holocene age located along the Chile-Argentina border. An older center to the south contains a poorly preserved, 800-m-wide crater. A younger northern center along the national border has a well-preserved 400-m-wide crater and produced lava flows to the north and NE. The 5401-m-high summit of the Cerro Bayo complex, located west of the border in Chile, is the source of two viscous dacitic lava flows that traveled to the north and represent the most recent activity of the complex.
Originally posted 2010-11-08 04:32:39.
By ExploreNow Editor, on May 2nd, 2012%
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1995
Summit Elevation: 1307 m 4,288 feet
Latitude: 51.923°N 51°55’22″N
Longitude: 177.168°W 177°10’4″W
Symmetrical Kanaga stratovolcano is situated within the Kanaton caldera at the northern tip of Kanaga Island. The rim of Kanaton caldera forms a 760-m-high arcuate ridge south and east of Kanaga; a lake occupies part of the SE caldera floor. The volume of subaerial dacitic tuff is smaller than would typically be associated with caldera collapse, and deposits of a massive submarine debris avalanche associated with edifice collapse extend nearly 30 km to the NNW. Several fresh lava flows from historical or late prehistorical time descend the flanks of Kanaga, in some cases to the sea. Historical eruptions, most of which are poorly documented, have been recorded since 1763. Kanaga is also noted petrologically for ultramafic inclusions within an outcrop of alkaline basalt SW of the volcano. Fumarolic activity occurs in a circular, 200-m-wide, 60-m-deep summit crater and produces vapor plumes sometimes seen on clear days from Adak, 50 km to the east.
Click Here For The Rest Of Kanaga, Aleutian Islands, USA
Originally posted 2010-08-21 05:01:04.
By ExploreNow Editor, on May 2nd, 2012%
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1786
Summit Elevation: 4317 m 14,163 feet
Latitude: 41.409°N 41°24’32″N
Longitude: 122.193°W 122°11’36″W
Mt Shasta is the largest volcano in the Cascade Range. The volcano was destroyed by the earth’s largest avalanche in the Quaternary period (1.8 million years and 2.6 million years ago). The eruption of 1786 was viewed from the Ship La Perouse. Volcanic Features of Shasta Shastina, Black Butte, Sargents Ridge, Misery Hill, Hotlum Cone.
 Shasta Volcano Click Here For The Rest Of Shasta, California, USA
Originally posted 2010-08-26 04:52:09.
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