rock flour

Words nearby rock flour

Example sentences from the Web for rock flour

• Mountains were moved piecemeal, and ground to boulders, pebbles, and rock-flour in the moving.

  The Spell of the Rockies|Enos A. Mills

• Nearly all of the soil in the Park is rock-flour that was ground by glaciers, and in part distributed by them.

  Your National Parks|Enos A. Mills

• Mountains are moved piecemeal, and are ground to boulders, pebbles, and rock-flour in the moving.

  Your National Parks|Enos A. Mills