Well-rounded, subrounded, subangular and angular bulky-shaped grains describe what soil type?

Well-rounded, subrounded, subangular and angular bulky-shaped grains describe what soil type?

• A. Cohesive
• B. Organic
• C. Fine-grained
• D. Non-cohesive

Answer: (D)

Grain shape descriptions like well-rounded to angular point to granular, coarse-grained soils. These soils are non-cohesive because there is little or no cementing between particles; their strength comes mainly from interparticle friction and interlock rather than bonding. The variety in shapes affects how the grains pack and how they shear, with angular grains interlocking more and often providing higher friction than rounded grains. This description wouldn’t fit cohesive soils such as clays that rely on cohesion, nor would it specifically describe fine-grained or organic soils, which are categorized by their composition and texture rather than grain shape.

Grain shape descriptions like well-rounded to angular point to granular, coarse-grained soils. These soils are non-cohesive because there is little or no cementing between particles; their strength comes mainly from interparticle friction and interlock rather than bonding. The variety in shapes affects how the grains pack and how they shear, with angular grains interlocking more and often providing higher friction than rounded grains. This description wouldn’t fit cohesive soils such as clays that rely on cohesion, nor would it specifically describe fine-grained or organic soils, which are categorized by their composition and texture rather than grain shape.