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سنگوارهشناختی
The past distribution pattern of a live species may differ very significantly from that of its palaeontological remains, as a result of taphonomic processes (consider the cave bear).
Variables of tech- nique are susceptible to taphonomic selection and technique is frequently misidentified, especially in the case of petroglyphs.
Finally, it is rendered less credible by the taphonomic factor that nowhere else in the world is there a Pleistocene paint- ing tradition that has survived in such large numbers of motifs out of caves.
The apparent rarity of the few significantly older samples as well as the dates' chrono- logical distribution suggest that this result reflects taphonomic dynamics (Bednarik, 1994a).
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