"But Boucher de Perthes... ...also secured his position as a paid-up member of the lunatic fringe. Alongside his perceptive observations of stratigraphy and artefacts in the gravel pits of Abbeville and Amiens he also illustrated many stone sculptures. His claims for heads of birds and humans in natural lumps of gravel undoubtedly delayed the full acceptance of his scientific observations." Professor Clive Gamble, University of Southampton
Countless world archaeology sites have been missed or destroyed by academicians and professionals because there was no consideration or accounting of iconic stone sculpture material like this that would have contained substantially more cultural information about the past than technological tool sets.
Because it is fundamentally dysfunctional as a science, Archaeology is not able to 'walk out on limbs' like most other sciences which welcome novel hypotheses. In the case of portable rock art, they prefer to cut the limb off at the trunk based on long-standing dogma rather than pursue what could be a major new branch of archaeological inquiry.