You searched for: “phi grade scale
phi grade scale, phi scale
In geology, a logarithmic scale in which the diameter value of the Wentworth scale is replaced by the negative logarithm to the base two of the particle diameter (in millimeters), so that conventional statistical methods can be applied to sedimentary data.
This entry is located in the following units: grad-, -grade, -gred, -gree, -gress (page 5) phi; Φ, φ + (page 1)