Question

________ is decomposed volcanic ash containing a high percentage of clay mineral.

(a) Moorum

(b) Peat

(c) Dune sand

(d) Bentonite

This question was posed to me by my college professor while I was bunking the class.

I'd like to ask this question from Flocculent and Dispersed Structures topic in section Soil Structure and Clay Minerology of Geotechnical Engineering I

Answer 1

Correct answer is (d) Bentonite

Explanation: Moorum is gravel mixed with red clay. Peat is a highly organic soil which is highlt compressible and fibrous. Dune sand is non-plastic uniformly graded fine sand.