@article{fdi:010086353,
  title = {{L}ithological control on topographic relief evolution in a slow tectonic setting ({A}nti-{A}tlas, {M}orocco)},
  author = {{C}lementucci, {R}. and {B}allato, {P}. and {S}iame, {L}. {L}. and {F}accenna, {C}. and {Y}aaqoub, {A}. and {E}ssaifi, {A}. and {L}eanni, {L}aetitia and {G}uillou, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}opographic relief results from the complex interactions between tectonics and erosional surface processes, which are primarily mediated by bedrock erodibility and climatic conditions. {A}ncient orogens offer a favourable setting to isolate the contribution of lithology, as tectonically driven rock uplift is typically negligible and rock strength variability can exert a critical role on the evolution of the topography. {T}he {A}nti-{A}tlas in {NW} {A}frica is a late {P}aleozoic orogen comprising a well-preserved, elevated, relict landscape delimited by non-lithological knickpoints, that was uplifted during a regional late {C}enozoic phase of topographic rejuvenation. {H}ere, we combine a geomorphic analysis with 10{B}e-derived denudation rates to quantify bedrock erodibility and get insight into the surface evolution of the {A}nti{A}tlas and the adjacent {S}iroua {M}assif. {S}pecifically, we show that 10{B}e basin-wide denudation rates for the relict landscape are rather uniform and range from 5 to 12 m/{M}yr. {T}hese rates agree with long-term rates estimated from different methods suggesting that the relict topography archives erosional quasi-erosional steady-state conditions at least since the latest {C}retaceous. {T}he uniformly low 10{B}e denudation rates in the relict topography are consistent despite the variability in channel steepness and topographic relief that correlates with changes in rock type. {T}he expansion of this analysis to the denudation rates of the downstream portion of the landscape, allows to demonstrate a linear relationship between denudation and channel steepness for catchments draining quartz bearing lithologies. {T}his provides the chance to constrain a narrow range of bedrock erodibility values for different rock-types (quartzite, granitic and sedimentary rocks). {T}hese values are comparable with estimates from other slowly deforming settings. {S}pecifically, our compilation from tectonically inactive to slow tectonic regions indicates that bedrock erodibility does not change significantly across different climatic zones and precipitation regimes. {T}his highlights the critical role of lithology in controlling the production of topographic relief in postorogenic/slow tectonic settings. {F}inally, we calculate the predicted denudation rates for the steeper portions of the landscape that adjusted to the new uplift rates based on the linear correlation between erosion rates and normalized steepness indices. {T}hese rates range from 20 to 50 m/{M}yr and agree with the direct measurements from two catchments.},
  keywords = {cosmogenic nuclides ; quantitative geomorphology ; bedrock erodibility ; denudation rates ; {A}tlas {M}ountains ; topographic relief ; {MAROC} ; {ANTI} {ATLAS}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {596},
  numero = {},
  pages = {117788 [12 ]},
  ISSN = {0012-821{X}},
  year = {2022},
  DOI = {10.1016/j.epsl.2022.117788},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086353},
}