La Grille
Encyclopedia
11.47°S 43.33°E
La Grille is a volcano
in the Comoros
is located in the Comoros archipelago on the island of Grande Comore
(also known as Ngazidja).
La Grille is a shield volcano at the northern end of island and lacks a summit caldera like its larger and more well-known neighbor to the south, Karthala volcano. The basaltic La Grille volcano also contrasts with Karthala in its abundance of pyroclastic cones up to 800m in height. The cones were erupted along fissures paralleling the summit ridge, which has an irregular profile and is elongated in a N-S direction, and from radial fissures that reach as far as the coast. Recent lava flows, some perhaps as young as a few hundred years, have reached the sea from fissures on the lower western, northern, and eastern flanks.
La Grille appears as a mountain range, elongated in a north-south, consisting of a stratovolcano
cones covered slag height of 800 meters on average, giving the volcano a maximum altitude of 1087 meters http://www.volcano.si.edu/world/volcano.cfm?vnum=0303-001. Unlike its neighbor Karthala, La Grille does not have caldera
. Different eruptive vents are organized along the fissures that run the volcano from north to south, parallel to the ridge of the mountain, and other cracks along the coast winner. Of these eruptive vents, lava basalt escapes sometimes reaching the sea on the east, north and west sides of the volcano. Many lava flows are still visible as few are rapidly recolonized by tropical vegetation on the island.
La Grille is a volcano
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
in the Comoros
Comoros
The Comoros , officially the Union of the Comoros is an archipelago island nation in the Indian Ocean, located off the eastern coast of Africa, on the northern end of the Mozambique Channel, between northeastern Mozambique and northwestern Madagascar...
is located in the Comoros archipelago on the island of Grande Comore
Grande Comore
Grande Comore is an island in the Indian Ocean off the coast of Africa. It is the largest island in the Comoros nation. Most of its population is of the Comorian ethnic group. Its population as of 2006 is about 316,600. The island's capital is Moroni, which is also the national capital...
(also known as Ngazidja).
La Grille is a shield volcano at the northern end of island and lacks a summit caldera like its larger and more well-known neighbor to the south, Karthala volcano. The basaltic La Grille volcano also contrasts with Karthala in its abundance of pyroclastic cones up to 800m in height. The cones were erupted along fissures paralleling the summit ridge, which has an irregular profile and is elongated in a N-S direction, and from radial fissures that reach as far as the coast. Recent lava flows, some perhaps as young as a few hundred years, have reached the sea from fissures on the lower western, northern, and eastern flanks.
Geography
La Grille is located on the island of Grande Comore, an island in the Comoros in the Comoros archipelago bounded by the Mozambique Channel in the Ocean Indian. Occupying the northern island of Grande Comore, bound on the south by the Karthala, another volcano rising to 2361 meters. The road going around the island of Grande Comore via the coast sides the east, north and west of La Grille connecting the airport Prince Said Ibrahim to the west. Many villages are located near the coast and on the volcano where there are also electricity pylons.La Grille appears as a mountain range, elongated in a north-south, consisting of a stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...
cones covered slag height of 800 meters on average, giving the volcano a maximum altitude of 1087 meters http://www.volcano.si.edu/world/volcano.cfm?vnum=0303-001. Unlike its neighbor Karthala, La Grille does not have caldera
Caldera
A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...
. Different eruptive vents are organized along the fissures that run the volcano from north to south, parallel to the ridge of the mountain, and other cracks along the coast winner. Of these eruptive vents, lava basalt escapes sometimes reaching the sea on the east, north and west sides of the volcano. Many lava flows are still visible as few are rapidly recolonized by tropical vegetation on the island.