Definition
Ejecta deposit is materials excavated from a crater cavity during impact or erupted from a volcanic vent.
Subtypes
- (1)
Impact crater ejecta deposit: reworked and/or melted crustal materials that are transported beyond the rim of the transient cavity formed directly by the cratering flow field (Osinski et al. 2011) (Ejecta (Impact)):
- (1.1)
Mostly lithic: ejecta (radial ejecta, layered ejecta)
- (1.2)
- (1.1)
- (2)
Volcanic ejecta deposits:
- (2.1)
Lithic and juvenile: pyroclastic deposits, tephra deposits (from plume fallout, Plume deposit (types))
- (2.2)
Juvenile (from magma only): cinder cone (ballistic ejecta)
- (2.3)
Juvenile, liquid: spatter cone (ballistic ejecta)
- (2.1)
- (3)
Formation
Excavated/erupted material emplaced by ballistic, atmospheric, or aqueous sedimentation.
Composition
Rock and mineral fragments or melts. Impact ejecta is reworked crustal materials, while volcanic ejecta can contain both juvenile and lithic elements.
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References
Osinski GR, Tornabene LL, Grieve RAF (2011) Impact ejecta emplacement on terrestrial planets. Earth Planet Sci Lett 310:167–181
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© 2015 Springer Science+Business Media New York
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Hargitai, H. (2015). Ejecta Deposit. In: Hargitai, H., Kereszturi, Á. (eds) Encyclopedia of Planetary Landforms. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3134-3_648
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DOI: https://doi.org/10.1007/978-1-4614-3134-3_648
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