Get premium membership and access questions with answers, video lessons as well as revision papers.
Formations in Which Minerals Occur
1. Veins and Lodes.
Occurrence of minerals in crevices, cracks or faults in igneous rocks.
- They are said to occur in veins if they occur there in small quantities.
- Said to occur in lodes if they occur there in large quantities e.g. zinc, copper and silver.
2. Reefs
-Veins and lodes which are exposed on the surface.
3. Seams/Layers/Beds
-Occurrence of minerals as sedimentary or as a result of compression of accumulated organic or inorganic material e.g. coal and halite.
4. Alluvial Deposits
-Occurrence of minerals while mixed with materials such as sand, gravel, silt, etc.
These were minerals which were detached from the veins by weathering and carried away by streams and rivers and got deposited e.g. gold, diamond and platinum.
5. Weathering Products
-Minerals formed by deep weathering of rocks then leaching carried minerals from the top to lower layers where they accumulated e.g. aluminium, nickel, iron and manganese.
6. Oil pools/Wells
-Occurrence of minerals in pools or wells in sedimentary rocks e.g. petroleum and natural gas.
maurice.mutuku answered the question on June 10, 2017 at 12:42
- What is podzolization?(Solved)
Describe podzolization as a process of leaching.
Date posted: June 10, 2017. Answers (1)
- What are the soil erosion control measures?(Solved)
Give the soil erosion control measures.
Date posted: June 10, 2017. Answers (1)
- How does overgrazing lead to loss of soil fertility?(Solved)
Describe how overgrazing leads to loss of soil fertility.
Date posted: June 10, 2017. Answers (1)
- How does mulching help in soil conservation?(Solved)
Explain how mulching helps in soil conservation.
Date posted: June 10, 2017. Answers (1)
- How does frequent ploughing lead to loss of soil fertility?(Solved)
Describe how frequent ploughing leads to loss of soil fertility.
Date posted: June 10, 2017. Answers (1)
- How does parent rock influence soil formation?(Solved)
Describe how parent rock influences soil formation.
Date posted: June 10, 2017. Answers (1)
- Which factors determine soil leaching?(Solved)
List the factors that determine soil leaching.
Date posted: June 10, 2017. Answers (1)
- How do biotic factors influence soil formation?(Solved)
Describe how biotic factors influence soil formation.
Date posted: June 10, 2017. Answers (1)
- What are the types of soil degeneration?(Solved)
Give the types of soil degeneration.
Date posted: June 10, 2017. Answers (1)
- How does monoculture cause soil erosion?(Solved)
Explain how monoculture causes soil erosion.
Date posted: June 10, 2017. Answers (1)
- How does continuous irrigation lead to loss of soil fertility?(Solved)
Explain how irrigation leads to loss of soil fertility.
Date posted: June 10, 2017. Answers (1)
- How does burning cause soil erosion?(Solved)
Explain how burning causes soil erosion.
Date posted: June 10, 2017. Answers (1)
- How does time influence the formation of soil?(Solved)
Explain how time influences the formation of soil.
Date posted: June 10, 2017. Answers (1)
- What is the difference between soil structure and soil texture?(Solved)
Distinguish between soil structure and soil texture.
Date posted: June 10, 2017. Answers (1)
- How does continuous application of fertilizer on farm lands cause soil erosion?(Solved)
Describe how continuous application of fertilizer on farm lands causes soil erosion.
Date posted: June 10, 2017. Answers (1)
- How does laterization occur?(Solved)
Describe how laterization occurs.
Date posted: June 10, 2017. Answers (1)
- What are the factors determining the colour of soil?(Solved)
Give the factors that determine the colour of soil.
Date posted: June 10, 2017. Answers (1)
- What is soil catena?(Solved)
Describe soil catena.
Date posted: June 10, 2017. Answers (1)
- What are the characteristics of the soils found in the arid regions of Kenya?(Solved)
List the characteristics of the soils found in the arid regions of Kenya.
Date posted: June 10, 2017. Answers (1)
- How does humus improve the quality of soil?(Solved)
Give ways in which humus improves the quality of soil.
Date posted: June 10, 2017. Answers (1)