January 2023

Calderas

By |2022-09-15T12:44:27+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

El Boqueron caldera in El Salvador. Image credit Wikispaces.com El Boqueron caldera in El Salvador. Image credit Wikispaces.com ZIMSEC O Level Geography Notes: Calderas

  • Calderas are very large craters often two or more kilometers in diameter that form at the top of volcanoes.
  • They are often deep extending downwards for a few hundred […]
Read More
Comments Off on Calderas

Lava Plateaus

By |2022-09-15T12:44:27+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Fissure eruptions at Mt Nyiragongo. Image credit Imgsoup. Fissure eruptions at Mt Nyiragongo. Image credit Imgsoup. ZIMSEC O Level Geography Notes: Lava Plateaus

  • Lava eruptions through narrow cracks (fissures) tends to be very quiet and subdued.
  • The lava spreads out over the surrounding countryside.
  • Successive lava outpourings causes successive layers of lava to […]
Read More
Comments Off on Lava Plateaus

Hot springs and geysers

By |2022-09-15T12:44:26+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Castle Geyser USA. Image credit Flyingfishphotography.com Castle Geyser USA. Image credit Flyingfishphotography.com ZIMSEC O Level Geography Notes: Hot Springs and Geysers

  • Besides the major intrusive and extrusive landforms resulting from volcanic activity, other minor features of volcanoes include: hot springs, mud-pots, pools of boiling water, fumaroles and […]
Read More
Comments Off on Hot springs and geysers

Benefits and Problems of Volcanoes

By |2022-09-15T12:44:26+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Fertile volcanic soil Kenya. Image credit tishaferral.com Fertile volcanic soil Kenya. Image credit tishaferral.com ZIMSEC O Level Geography Notes: Benefits and Problems of Volcanoes

Benefits of volcanoes to humans

  • They eject lava and ash which in turn produce very fertile soils which boost agriculture activities.
  • Volcanoes and areas near them can […]
Read More
Comments Off on Benefits and Problems of Volcanoes
Toggle Sliding Bar Area
Go to Top