Reply to comment by Yanni Gunnell and Marc Calvet on "Origin of the highly elevated Pyrenean peneplain"
Résumé
Gunnell and Calvet [2006] (hereinafter referred to as
GC) challenge the recent model that we proposed for the
origin of the highly elevated Pyrenean peneplain by contest-
ing our morphometric analysis of this chain and the relation
we made between the morphological evolution and the
piedmont sedimentation. Their reasoning is as follows: (1)
According to Calvet [1996] (on which their comment is
largely based) the high-elevation, low-relief surfaces in the
Eastern Pyrenees are remnants of a peneplain that devel-
oped before the Pliocene from applanation near to sea level,
and which was later uplifted by 2000 m during the Plio-
Quaternary (in other words, GC belong to the ‘‘applanation’’
school, whereas we woul d belong to the ‘‘altiplanation’’
school); (2) high-elevation, low-relief surfaces do not exist
in the Central Pyrenees; (3) therefore the relationships we
made between the morphology of the Central Pyrenees and
the pattern of the detrital sedimentation in the adjacent Ebro
foreland basin is meaningless; (4) contrary to the initial
interpretation of Calvet [1996], GC recognize that crustal
thickening did not develop since the Pliocene in the Eastern
Pyrenees, so they appeal to another geodynamical process
such as extension or lithosphere delamination to explain the
supposed uplift.
Domaines
Géomorphologie
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