Finely powdered rock formed by glacial or other erosion.
- Much quick clay does not consist of true clay minerals but rather of glacial rock flour: clay-sized particles of quartz and feldspar produced by glacial abrasion of bedrock.
- Electron microscope examinations of undisturbed samples reveal soil diagenesis and a high percentage of rock flour in the clay fraction.
- Unless it's required to pulverize all the coarse material, normally only a portion is taken to the next stage and pulped (ground to rock flour) using a special tungsten carbide mill.
For editors and proofreaders
Syllabification: rock flour
Definition of rock flour in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.