Ejecta ceiling
An ejecta cover is a deposit of ejecta around an impact crater or a volcano .
Emergence
On impact ( impact ) of a small celestial body on the surface of a larger, for example the impact of a meteoroid (asteroid or comet) on the Earth's surface, a crater is formed by explosive ejection of material. The ejected materials are called ejecta .
The deposition of the ejecta after the impact takes place, at least in part, through the free flight of the ejected material, i.e. as " ballistic sedimentation". This creates a so-called “continuous ejecta blanket” - a continuous blanket of ejecta - around the impact crater . If the material contains larger chunks, secondary craters can also form.
In ejecta sheets caused by volcanoes, rock material and lava are ejected during explosive volcanic eruptions . For example, they are deposited as a layer of tuff or lapilli around the volcano and form a closed blanket that can be several meters thick, in some cases several dozen meters.