Fortunately, in Earth Sciences nowadays we benefit from a huge amount of available multi-temporal high resolution reliable numerical data. Moreover, most of the processes that creates the landforms of the Earth have already been seen, described and analyzed. But their interpretations as a whole remain partially and imperfectly done and should be optimized in the light of the new data in order to up-date our knowledge. Taking into account such recent data, and the already discrete described processes, a global analyze of the Earth landforms combined to detailed analyzes of seismic reflection profiles face numerous discrepancies that lead us to propose new paradigms and models that take into account thin- and thick-skin Earth crustal processes.
The structural evolution of volcanic edifices remains poorly known presently. We focus herein to decipher the different stages of evolution by establishing a new model of taking into account landforms, thin and thick-skin crustal processes.
As case examples, we focus on (1) the evolution of volcanoes situated above SE Asian geodynamic volcanic arcs (Philippines & Indonesian volcanic arcs); and (2) The example of the Piton des Neiges/Piton de la Fournaise (La Réunion island) Hot-Spot to precise some aspects of our new model of volcanoes evolution. Then, through the detailed analysis of the volcanic edifice landforms, we propose to deduce some buried thick-skin crustal processes and to reconstruct and predict their evolution. Effectively we infer that the deep thick-skin crustal structures influenced the landforms of volcanic edifices. This study shows once more the importance of “Observation” in the structural analyses of the landforms as well as deeper crustal structures in order to decipher the Earth processes.
Keywords: Volcanoes evolution|Geodynamics|Structural geomorphology|Volcanic arc|Hot-spot
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