@article{fdi:010076232,
  title = {{G}eological and geophysical studies of the {A}goudal impact structure ({C}entral {H}igh {A}tlas, {M}orocco) : new evidence for crater size and age},
  author = {{E}l {K}erni, {H}. and {C}hennaoui {A}oudjehane, {H}. and {B}aratoux, {D}avid and {A}oudjehane, {M}. and {C}harriere, {A}. and {I}bouh, {H}. and {R}ochette, {P}. and {Q}uesnel, {Y}. and {U}ehara, {M}. and {K}enkmann, {T}. and {W}ulf, {G}. and {P}oelchau, {M}. and {N}guyen, {V}. {B}. and {A}boulahris, {M}. and {M}akhoukhi, {S}. and {A}umaitre, {G}. and {B}ourles, {D}. and {K}eddadouche, {K}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ince the discovery of shatter cones ({SC}s) near the village of {A}goudal ({M}orocco, {C}entral {H}igh {A}tlas {M}ountains) in 2013, the absence of one or several associated circular structures led to speculation about the age of the impact event, the number, and the size of the impact crater or craters. {A}dditional constraints on the crater size, age, and erosion rates are obtained here from geological, structural, and geophysical mapping and from cosmogenic nuclide data. {O}ur geological maps of the {A}goudal impact site at the scales of 1:30,000 (6 km(2)) and 1:15,000 (2.25 km(2)) include all known occurrences of {SC}s in target rocks, breccias, and vertical to overturned strata. {C}onsidering that strata surrounding the impact site are subhorizontal, we argue that disturbed strata are related to the impact event. {T}hree types of breccias have been observed. {T}wo of them (br1-2 and br2) could be produced by erosion-sedimentation-consolidation processes, with no evidence for impact breccias, while breccia (br1) might be impact related. {T}he most probable center of the structure is estimated at 31 degrees 59 ' 13.73"{N}, 5 degrees 30 ' 55.14"{W} using the concentric deviation method applied to the orientation of strata over the disturbed area. {D}espite the absence of a morphological expression, the ground magnetic and electromagnetic surveys reveal anomalies spatially associated with disturbed strata and {SC} occurrences. {T}he geophysical data, the structural observations, and the area of occurrence of {SC}s in target rocks are all consistent with an original size of 1.4-4.2 km in diameter. {C}osmogenic nuclide data ({C}l-36) constrain the local erosion rates between 220 +/- 22 m {M}a(-1) and 430 +/- 43 m {M}a(-1). {T}hese erosion rates may remove the topographic expression of such a crater and its ejecta in a time period of about 0.3-1.9 {M}a. {T}his age is older than the {A}goudal iron meteorite age (105 +/- 40 kyr). {T}his new age constraint excludes the possibility of a genetic relationship between the {A}goudal iron meteorite fall and the formation of the {A}goudal impact site. {A} chronolgy chart including the {A}tlas orogeny, the alternation of sedimentation and erosion periods, and the meteoritic impacts is presented based on all obtained and combined data.},
  keywords = {{MAROC} ; {HAUT} {ATLAS} ; {AGOUDAL}},
  booktitle = {},
  journal = {{M}eteoritics and {P}lanetary {S}cience},
  volume = {54},
  numero = {10},
  pages = {2483--2509},
  ISSN = {1086-9379},
  year = {2019},
  DOI = {10.1111/maps.13347},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076232},
}