penepalimpsests Archives

a) Central pit crater Tindr on Callisto (2.3°S, 4.5°E) b) Central dome crater Eshmun on Ganymede (17.5°S, 167.9 °E). North is towards the top of the image, scale bars measure 20 km (White et al., 2022).

Astrogeology, Callisto, Caves, Craters, Mountains, Subsurface, Lava Tubes, Ganymede, Icy Worlds, Jupiter, Mapping, Geodesy, Cartography, Bathymetry, Status Report

Iceworld Morphology: Dome Craters on Ganymede and Callisto May Form by Topographic Relaxation of Pit Craters Aided by Remnant Impact Heat

by Keith CowingMarch 26, 2024March 26, 2024

The icy Galilean satellites display impact crater morphologies that are rare in the Solar System. They deviate from the archetypal sequence of crater morphologies as a function of size found […]

Astrogeology, Callisto, Caves, Craters, Mountains, Subsurface, Lava Tubes, Ganymede, Icy Worlds, Imaging & Spectroscopy, Impact events, Mapping, Geodesy, Cartography, Bathymetry, Status Report

Large Impact Features on Ganymede and Callisto as Revealed by Geological Mapping and Morphometry

by Keith CowingMarch 22, 2024March 22, 2024

We have performed topographic and geological mapping of 19 large impact features on Ganymede and Callisto in order to gather morphometric and crater age data that allow us to quantify […]