A polished petrified tree slice tabletop A polished petrified tree slice tabletop, Upper Cretaceous or Palaeocene period, Sahara Desert, specimen name Detarioxylon aegyptiacum, 154cm wide 116cm deep 9cm high Presented with a digital copy of a report by the British Museum (Natural History) Fossil Plants section which attributes to this piece a geological age of up to 70,000,000 years old.