Question

Consider the following clay minerals:
1. Kaolinite
2. Illite
3. Montmorillonite
Which one of the following is the correct sequence of the minerals given above in the increasing order of their grain size?

• A. 3-2-1
• B. 1-3-2
• C. 1-2-3
• D. 3-1-2

Answer 1

The correct option is A 3-2-1

(a)
Thickness (A) Lateral dimension(A)
Kaolinite 100 - 1000 1000 -20,000
Montmorillonite 10 - 50 1000-5000
lllite 50 - 500 1000- 5000
Thus size of kaolinite > Illite > Montmorillonite