vent agglomerate

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agglomerate — GLOSSARY OF VOLCANIC TERMS A course, pyroclastic deposit composed of a large proportion of fluidal shaped volcanic bombs that are formed, in the strictest sense, by a fall deposit in the immediate vicinity of a volcanic vent. It is best applied… … Glossary of volcanic terms
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Puy — See also the French département of Puy de Dôme, the medieval poetry guilds at puy (society), and several French places named Le Puy .Puy is a geological term used locally in the Auvergne, France for a volcanic hill. The word derives from the… … Wikipedia
Rusinga Island — Rusinga Island, with an elongated shape approx. 10 miles (16 km) from end to end and 3 miles (5 km) at its widest point, lies in the eastern part of Lake Victoria at the mouth of the Winam Gulf. Part of Kenya, it is linked to Mbita Point on the… … Wikipedia
lava dome — A rounded or irregular mound, hill or small mountain composed of lava congealed over a volcanic vent on the flanks or within a crater or caldera. Typically composed of silica rich volcanic rocks (e.g., rhyolite, dacite) with admixtures of… … Glossary of landform and geologic terms

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