landforms Archives - Free ZIMSEC & Cambridge Revision Notes

Landforms resulting from weathering

By garikaib|2017-01-17T11:22:10+02:00June 10th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Ruware/Dwala. Image credit WordPress.com

Ruware/Dwala. Image credit WordPress.com ZIMSEC O Level Geography Notes: Landforms resulting from weathering.

Weathering processes and usually in conjunction with other denudation processes such as water and wind erosion and mass wasting results in the formation of various landscapes.
In temperate and tropical latitudes these include:

1.Inselbergs/Monadnocks

The […]
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Weathering

By garikaib|2017-01-17T11:22:14+02:00June 9th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A weathered boulder. Image credit earthlearningidea.

A weathered boulder. Image credit earthlearningidea. ZIMSEC O Level Geography Notes: Weathering

Earth movements (plate tectonics) create and lead to the development of the earth’s major landforms for example block mountains, volcanic cones, lava plateaus and rift valleys.
As soon as they are formed denudation processes […]
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Lava Plateaus

By garikaib|2017-01-17T11:22:18+02:00June 8th, 2015|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 […]
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Calderas

By garikaib|2017-01-17T11:22:19+02:00June 8th, 2015|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 […]
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Landforms resulting from intrusive vulcanicity

By garikaib|2017-01-17T11:22:20+02:00June 6th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Some of the landforms resulting from intrusive vulcanicity. Image by Msneucleus.org

Some of the landforms resulting from intrusive vulcanicity. Image by Msnucleus.org ZIMSEC O Level Geography Notes: Landforms resulting form intrusive vulcanicity

Intrusive vulcanicity is the movement of gasses, magma and other materials into the earth’s curst to form interior volcanic […]

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Vulcanicity

By garikaib|2017-01-17T11:22:23+02:00June 6th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Violent volcanic eruption. Image by Dailymail.

Violent volcanic eruption. Image via Dailymail. ZIMSEC O Level Geography Notes: Vulcanicity

Vulcanicity refers to all the various way by which molten rock and gasses are forced into the earths and onto its surface.
It includes volcanic eruptions which lead to the formation of volcanoes, lava plateaus and geysers.
It […]
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Landforms resulting from faulting

By garikaib|2017-01-17T11:22:25+02:00June 4th, 2015|Landform Studies, Notes, O Level Geography|

The Great African Rift Valley. Image by Mamonthsafaris.

The Great African Rift Valley. Image by Mamonthsafaris. ZIMSEC O Level Geography Notes: Landfroms resulting from faulting.

Major landforms that result from faulting include:

Block Mountains
Rift valleys
Tilted blocks.

1. Block Mountains The formation of block-mountains (Horst). Image by WikiComons

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Faulting

By garikaib|2017-01-17T11:22:26+02:00June 4th, 2015|Landform Studies, Notes, O Level Geography|

Common types of faults.

Common types of faults. Image via Noaa.gov ZIMSEC O Level Geography Notes: Faulting.

Lateral earth movements often produce very great stresses due to compressional forces (when plates move towards one another) and tensional forces (pulling apart).
These forces can cause fractures or breaks in the earth’s crust.
When breaks […]
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Folding

By garikaib|2017-01-17T11:22:27+02:00June 3rd, 2015|Landform Studies, Notes, Ordinary Level Notes|

Simple Folding. Image by Pixshark.

Simple Folding. Image by Pixshark. ZIMSEC O Level Geography: Folding

Tectonic movements are those movements that result from the earth’s internal forces.
When forces move horizontally towards one another they are known as compressional.
Rocks that make up the earth’s crust are subjected to these compressional forces in a […]
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Divergence/Constructive zone/plates

By garikaib|2017-01-17T11:22:29+02:00June 1st, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Divergent plates. Image by Cornel.

Divergent plates. Image by Cornel. ZIMSEC O Level Geography Notes: Plate Tectonics: Convergence Plates

In a divergence zone plates move away from one another thus the name “divergence.”
Magma up-wells from the mantle to fill the gap left by the diverging plates.
The magma provides new material to form […]
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June 2015

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