Shingle is
Try it first: pick an option, then read the explanation.
Understanding Shingle
Shingle is a general term for loose, rounded rock fragments that are larger than sand but smaller than cobbles. The defining characteristic of shingle is its shape: the individual stones (or pebbles) have been naturally worn down and rounded by the action of moving water, such as on a beach or in a riverbed.
Detailed Analysis of the Options
A. Water bound pebbles
This is the best description and the correct answer. "Pebbles" accurately describes the size of the stones. The term "water bound" perfectly describes their origin and the process that gives them their characteristic smooth, rounded shape. The constant tumbling action of water binds them together in deposits and wears away their sharp edges.
B. Disintegrated laterite
Laterite is a type of soil and rock rich in iron and aluminum, found in tropical regions. When it disintegrates, it forms a reddish, clay-like soil or gravelly material. This is not called shingle, which is defined by its water-worn nature, not its specific mineral composition.
C. Crushed granite
Crushed granite is a man-made aggregate produced by mechanically crushing large pieces of granite rock. The resulting particles are sharp, angular, and have rough surfaces. This is the opposite of shingle, which is naturally rounded and smooth.
D. None of these
This is incorrect, as "Water bound pebbles" is an accurate and standard definition of shingle.
Summary: Shingle vs. Other Materials
| Material | Origin | Shape | Also Known As |
|---|---|---|---|
| Shingle | Natural (Water Action) | Rounded, Smooth | Gravel, Beach Pebbles |
| Crushed Granite | Artificial (Mechanical Crushing) | Angular, Sharp | Aggregate, Road Metal |
| Disintegrated Laterite | Natural (Weathering) | Irregular, often earthy | Lateritic Soil/Gravel |
Study Tips
- Shingle = Seashore: The easiest way to remember is to think of a "shingle beach," which is a beach covered in smooth, rounded pebbles instead of sand.
- Nature-Made vs. Man-Made: Shingle is made by nature (water). Crushed aggregate is made by man (machines). This is a key difference.
- Round vs. Sharp: Shingle is round. Crushed rock is sharp.