@article{fdi:010077089,
  title = {{B}osumtwi impact structure, {G}hana : evidence for fluidized emplacement of the ejecta},
  author = {{B}aratoux, {D}avid and {N}iang, {C}. {A}. {B}. and {R}eimold, {W}. {U}. and {S}apah, {M}. {S}. and {J}essell, {M}. {W}. and {B}oamah, {D}. and {F}aye, {G}. and {B}ouley, {S}. and {V}anderheaghe, {O}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he about 10.5 km diameter {B}osumtwi impact crater is one of the youngest large impact structures on {E}arth. {T}he crater rim is readily noticed on topographic maps or in satellite imagery. {I}t defines a circular basin filled by water ({L}ake {B}osumtwi) and lacustrine sediments. {T}he morphology of this impact structure is also characterized by a circular plateau extending beyond the rim and up to 9-10 km from the center of the crater (about 2 crater radii). {T}his feature comprises a shallow ring depression, also described as an annular moat, and a subdued circular ridge at its outer edge. {T}he origin of this outermost feature could so far not be elucidated based on remote sensing data only. {O}ur approach combines detailed topographic analysis, including roughness mapping, with airborne radiometric surveys (mapping near-surface {K}, {T}h, {U} concentrations) and field observations. {T}his provides evidence that the moat and outer ring are features inherited from the impact event and represent the partially eroded ejecta layer of the {B}osumtwi impact structure. {T}he characteristics of the outer ridge indicate that ejecta emplacement was not purely ballistic but requires ejecta fluidization and surface flow. {T}he setting of {B}osumtwi ejecta can therefore be considered as a terrestrial analog for rampart craters, which are common on {M}ars and {V}enus, and also found on icy bodies of the outer solar system (e.g., {G}anymede, {E}uropa, {D}ione, {T}ethys, and {C}haron). {F}uture studies at {B}osumtwi may therefore help to elucidate the mechanism of formation of rampart craters.},
  keywords = {{GHANA} ; {BOSUMTWI}},
  booktitle = {},
  journal = {{M}eteoritics and {P}lanetary {S}cience},
  volume = {54},
  numero = {10},
  pages = {2541--2556},
  ISSN = {1086-9379},
  year = {2019},
  DOI = {10.1111/maps.13253},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077089},
}