Cinder cones
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed
lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into
small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most
cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or
so above their surroundings. Cinder cones are numerous in western North America as well as
throughout other volcanic terrains of the world.
(Most of the smaller cones surrounding Laguna Catemaco are cinder cones)
Shield volcanoes,
are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central
summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a
profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of
highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as
thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that
develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In
northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of
1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including
Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.
(the major Los Tuxtlas volcanoes are considered shield volcanoes)
Source:
US Geodesic Service
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed
lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into
small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most
cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or
so above their surroundings. Cinder cones are numerous in western North America as well as
throughout other volcanic terrains of the world.
(Most of the smaller cones surrounding Laguna Catemaco are cinder cones)
Shield volcanoes,
are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central
summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a
profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of
highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as
thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that
develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In
northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of
1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including
Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.
(the major Los Tuxtlas volcanoes are considered shield volcanoes)
Source:
US Geodesic Service
Volcanoes of Los Tuxtlas, Veracruz
Types of Volcanoes
Types of Volcanoes
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