What is the significance of 25 6 cm in the definition of a boulder

In geology, a boulder is defined as a rock fragment with a diameter greater than 25.6 cm. This definition was established by the International Union of Geological Sciences (IUGS) in 1973.

The significance of 25.6 cm in the definition of a boulder lies in its relationship to the Wentworth scale, a widely used scale for classifying clastic sediments based on their particle size. According to the Wentworth scale:

Particles with diameters < 2 mm are classified as fine-grained, including clay, silt, and sand.
Particles with diameters between 2 mm and 25.6 cm are classified as coarse-grained, including granules, pebbles, and cobbles.
Particles with diameters > 25.6 cm are classified as boulders.

Therefore, 25.6 cm represents the boundary between coarse-grained and boulder-sized particles. This distinction is important because boulders have distinct physical and ecological characteristics compared to smaller-sized sediments.

What is the significance of 25.6 cm in the definition of a boulder?
- It represents the boundary between coarse-grained and boulder-sized particles.
What is the Wentworth scale?
- A widely used scale for classifying clastic sediments based on particle size.
What are the different categories of particles according to the Wentworth scale?
- Fine-grained (clay, silt, sand), coarse-grained (granules, pebbles, cobbles), and boulders.
What is the difference between a pebble and a cobble?
- Pebbles have diameters between 4 mm and 64 mm, while cobbles have diameters between 64 mm and 256 mm.
What is the ecological significance of boulders?
- Boulders can provide habitat for various organisms, stabilize rivers, and protect coastlines from erosion.

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What is the significance of 25.6 cm in the definition of a boulder?

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