Rampart craters on Ganymede: Their implications for fluidized ejecta emplacement

Rampart craters on Ganymede: Their implications for fluidized ejecta emplacement

Some fresh impact craters on Ganymede have the overall ejecta morphology similar to Martian double-layer ejecta (DLE), with the exception of the crater Nergal that is most like Martian single layer ejecta (SLE) craters (as is the terrestrial crater Lonar). Similar craters also have been identified on Europa, but no outer ejecta layer has been found on these craters. The morphometry of these cra...

Rampart craters on Ganymede and Europa: implications for fluidized ejecta emplacement

Atmospheric Effects On Ejecta Emplacement

Laboratory experiments allow the investigation of complex interactions between impacts and an atmosphere. Although small in scale, they can provide essential first-order constraints on the processes affecting late-stage ballistic ejecta and styles of ejecta emplacement around much larger craters on planetary surfaces. The laboratory experiments involved impacting different fine-grained particul...

Role of Volatiles in the Emplacement of Ejecta Deposits around Martian Impact Craters

Introduction: Impact craters are a dominant geological landform on Mars, the most Earth-like planet in the Solar System. The martian impact cratering record is more diverse than for Earth and the other terrestrial planets [e.g., 1]. Of particular interest is the presence of multiple layers of lobate or fluidized proximal ejecta deposits surrounding martian impact craters. These are collectively...

A Catalog of Impact Craters on Ganymede

Introduction: Previous crater catalogs for Ganymede were based on Voyager analysis but Galileo data provides improved resolutions in the areas where it covered the moon and also helped fill in regions not imaged or imaged poorly by Voyager. Voyager and Galileo images combine to reveal the diversity of impact craters on this icy Jovian satellite. Previous studies cataloged the interior morpholog...