The rim projects above the surface of the Mare Frigoris, and a wrinkle ridge trends for over 100 km to the southeast from the edge.

To the south of Fontenelle on the lunar mare is a small, unnamed crater (about 4.5 km diameter) that is surrounded by a ray system of high albedo material.

This feature lies about 15 kilometers north-northwest of Fontenelle G. To the east of this crater is an unusual geometric configuration in the surface with an angular shape.

The crater was named in 1935 by the IAU after French astronomer Bernard le Bovier de Fontenelle.

[4] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Fontenelle.