When does a body become spherical?

[Nick]

Do scientists know of any sort of threshhold of mass at a which a rocky body will begin to take on a spherical shape under the influence of its own gravity?

[selden]

See the answer to Q 3 of
Problem Set #8 of the University of Rochester's course Astronomy 111:
http://astro.pas.rochester.edu/~aquille ... P8_sol.pdf

It shows how to calculate it.

[Nick]

Awesome.

Are there any landforms on any of the spherical terrestrial bodies we know of that might have been created by the deformation of the body's surface when it took on a spherical shape? If not, is something like that possible?