Concentric Crater (Moon)
An impact crater with one or more concentric ridges on the crater wall and/or crater floor with a central depression (Trang et al. 2011).
Generally, concentric craters tend to have a central depression within the concentric ridge. A break in slope or a depression may exist between the crater wall and the concentric ridge.
There are 114 concentric craters with diameters between 2 and 28 km (median, ∼8 km) (Trang et al. 2011, in prep.). Concentric craters have shallower depths than fresh craters of the same diameter.
A crater with a continuous smooth concentric ridge, displaying a V-shaped, circular valley between the crater wall and the concentric ridge. Example: Hesiodus A (Fig. 1).
A crater with a concentric ridge partitioned into smaller hills or domes. The concentric ridge displays a V-shaped, circular valley between...
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