Symmetrical apron of ejecta that surrounds an impact crater
Ejecta blanket from Hadley C crater filling in Hadley Rille
An ejecta blanket is a generally symmetrical apron of ejecta that surrounds an impact crater; it is layered thickly at the crater's rim and thin to discontinuous at the blanket's outer edge.[1] The impact cratering is one of the basic surface formation mechanisms of the solar system bodies (including the Earth) and the formation and emplacement of ejecta blankets are the fundamental characteristics associated with impact cratering event.[2] The ejecta materials are considered as the transported materials beyond the transient cavity formed during impact cratering regardless of the state of the target materials.[2]
structure of impact craters, showing surrounding ejecta
^
David Darling. "ejecta blanket". The Encyclopedia of Astrobiology, Astronomy, and Spacecraft. Retrieved 2007-08-07.
^ abOsinski, Gordon R.; Tornabene, Livio L.; Grieve, Richard A. F. (2011-10-15). "Impact ejecta emplacement on terrestrial planets". Earth and Planetary Science Letters. 310 (3): 167–181. Bibcode:2011E&PSL.310..167O. doi:10.1016/j.epsl.2011.08.012. ISSN 0012-821X.
An ejectablanket is a generally symmetrical apron of ejecta that surrounds an impact crater; it is layered thickly at the crater's rim and thin to discontinuous...
basins include the 400 km wide, multi-ring, Tolstoj Basin which has an ejectablanket extending up to 500 km from its rim, and its floor has been filled by...
Rainer Gersonde; Gerhard Kuhn (2005). "SEDIMENTATION PATTERNS OF METEORITIC EJECTA IN ELTANIN IMPACT DEPOSITS AT SITE PS58/281" (PDF). Lunar Science and Planetary...
ridges and hills, between which exist undulating valleys. Much of the ejectablanket from the Imbrium impact is covered with debris from younger impacts...
breccia inside the crater, of shatter cones, and of the non-volcanic ejectablanket surrounding the crater all support the impact origin of Lonar Lake.[citation...
Keays, R.R. (1989). "Geological Note: Discovery of the acraman impact ejectablanket in the officer basin and its stratigraphic significance" (PDF). Australian...
an impressive, well lineated ejectablanket that extends as far as 500 kilometres (311 mi). As at Tolstoj, Beethoven ejecta is asymmetric. The Caloris basin...
classified by their ejecta. Craters with one ejecta layer are called single-layer ejecta (SLE) craters. Craters with two superposed ejectablankets are called...
is apparently the remains of an ejectablanket that once surrounded the crater. Post-crater erosion removed the ejecta, except for the overlying graben...
the ejectablanket of the huge (45 km diameter) crater Plinius, on the east margin of a 25–40 km-wide band of material separating the ejectablanket from...
material were eroded away. The result is that both the crater and its ejectablanket stand above the surroundings. Pedestal craters were first observed during...
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