VULCANICITY is a process through which molten rocks (magma) are intruded within the earth’s crust or extruded onto the earths surface.
Vulcanicity is aided by the process of faulting which forms cracks in the earth’s crust through which magma escapes.
When magma is intruded within the earth’s crust, it cools down and solidifies to form intrusive volcanic features e.g. batholiths, sills, dykes, lapolith, and lacolith.
When magma is extruded onto the earth’s surface, it changes to lava leading to the formation of lava plateaus, calderas, craters, hot springs, fumaroles, and geysers.
Negative importances of vulcanicity
- Violent volcanic eruptions lead to destruction of property and human life.
- Volcanic mountains have caused rain shadows on the lee ward side of the mountain hence causing dry conditions.
- Salty volcanic lakes e.g. Lake Katwe cant support fishing and provision of water for human and domestic purposes.
- Mountains covered with thick forests which hide dangerous animals e.g. Gorillas, lions and Monkeys which make human settlement very difficult.
- Mountains are used as hide outs for criminals and rebels who destabilize peace and sanity in the surrounding communities.
- Volcanic rocks that are not fully weathered provide infertile soils that hinder agriculture.
- Landslides are common along Mountain slopes which are destructive to human life.
- Mountain tops are not suitable for human settlement due to extremely low temperatures.
- Mountains accelerate soil erosion which leads to loss of soil fertility.
- Dense population near mountains leads to land fragmentation on the lower slopes leading to land conflicts.