Use diagrams to describe the formation of fold mountains and explain four ways in which fold Mountains influence human activities

KCSE Geography Paper 1 1998 Section B Question 9.

1.(a) On the out line map of Africa provide, name the features marked X,Y and Z

• X- Atlas Mountains
• Y- Cape ranges
• Z- Ethiopian Highlands (3 mks)

​(b) (i) Name four folds

1. Simple fold/ symmetrical/ isoclinal
2. Asymmetrical fold
3. Over fold
4. Recumbent fold
5. Overthrust/ fold thrust/ nappe
6. Anticlinorium/ synclinorium (  4 mks)

​(ii) With the labeled diagrams, describe the formation of  fold mountains

1. Geosynclines are formed on the earth’s surface
2. Prolonged  and extensive erosion occurs on the surrounding higher grounds
3. Sediments are deposited in the geosynclines forming thick layers
4. The weight of the sediments causes subsidence of the geosyncline leading to accumulation of more sediments
5. Further subsidence of geosyncline triggers  off compressional forces, which draw the higher grounds closer
6. As a result, the sediments are compressed  and form folders which are also thrust upwards to form mountains
7. The main Mt. features are formed at the edge  of geosynclines due to closeness to the source of the forests.

​(iii) Explain four ways in which fold Mountains influence human activities.

1. Fold mountains are water catchments areas. They trap  rainfall which feed rivers that provide water  for domestic use/ for irrigation/ for industrial use/ for HEP generation/ rainfall for Africa
2. Fold mountains are often forested and provide valuable timber used in construction  and building industry.
3. Some  fold  mountains have valuable minerals deposits such as coal and petroleum
4. Fold mountains attract tourists, thus earning  the countries foreign exchange.
5. Fold mountains influence transport systems either as barriers  or as passes. 
   ​(4 x 2 = 8 mks)

Related Searches

more