Crater Keeler, crater_keeler.jpg

    Caption: Crater Keeler (AKA Crater 302): a typical large terraced crater on the Moon. The image is from Apollo 10, 1969 May01.

    Keeler is the largest crater in the image and it must be pretty big since the curvature of the Moon's limb is visible. In fact, it is ∼ 160 km in diameter

    Features:

    1. There is a crater central peak formed by rebound.

    2. Back falling ejecta provided a flatish floor.

    3. A rim wall produced by excavation plus shock pushing up the rim.

    4. The rim shows terraces which are created by landslides. Even on the Moon, slow erosion from meteoritic impacts, moonquakes, and heating-and-cooling expansion and contraction will eventually lead to landslides and slumps.

    5. Ejecta also falls outside the rim to about twice the crater diameter producing an apron which possibly can be descried.

    6. There may be secondary craters from the ejecta, but that is is NOT obvious in the image. So many later or earlier impacts have riddled the ground.

    7. See Wikipedia: Impact crater: Crater formation for more details on impact formation.

    Credit/Permission: NASA, 1969 / Public domain.
    Download site: NASA: Apollo 10 album.
    Image link: Itself.
    Local file: local link: crater_keeler.html.
    File: Moon Moonscape file: crater_keeler.html.