Question

which of the following orders sedimentary rock grain sizes from smallest to largest?
gravel, sand, silt, clay
clay, silt, sand, gravel
sand, clay, gravel, silt

Explanation:

To determine the correct order of sedimentary rock grain sizes from smallest to largest, we recall the standard grain size classification for sedimentary rocks. Clay particles are the smallest, followed by silt, then sand, and gravel is the largest among these. So the order from smallest to largest is clay, silt, sand, gravel.

Answer:

B. clay, silt, sand, gravel (assuming the options are labeled A, B, C with A being gravel, sand, silt, clay; B being clay, silt, sand, gravel; C being sand, clay, gravel, silt)