In this case, however, the fossils were found exposed in loose sand; co-discoverer Beauvilain cautions that such sediment can be easily moved by the wind, unlike packed earth, making the date of 7 million years less certain.
Porén, neste caso, os fósiles foron encontrados expostos en area solta; o codescubridor Beauvilain advirte que tales sedimentos poden ser movidos doadamente polo vento, a diferenza da terra compactada, o que fai a data de 7 millóns de anos menos segura.