a catalogue of documented anomalies on planet Earth // maintained by the Aliens
> RECORD OBS-0170 | status: PARTIALLY SUBSTANTIATED | filed 2026-07-31
Home > Science > Puma Punku geopolymer artificial stones

Puma Punku geopolymer artificial stones

RecordOBS-0170
CategoryScience/Suppressed Tech
StatusPARTIALLY SUBSTANTIATED
SummaryA fringe theory, promoted by materials scientist Joseph Davidovits, claims that the stones at Puma Punku and Tiwanaku are not natural rock but artificial geopolymers cast in molds. This would explain the precision and complexity of the blocks.
OriginProposed by Joseph Davidovits in the 1980s and further developed in a 2018 conference and subsequent papers.
Claimed
  • The sandstone and andesite blocks at Puma Punku are man-made geopolymer concrete.
  • The blocks were cast in place using a form of ancient concrete technology.
  • This explains the intricate shapes and precise fits that would be difficult to carve from natural stone.
Evidence / consensusSome scientific studies, including those by Davidovits, have found evidence of organic matter and geopolymer-like textures in the stones, but the theory is not widely accepted by mainstream archaeologists. Many geologists maintain the stones are natural andesite and sandstone, and the geopolymer evidence is disputed.
> OBSERVER NOTE:
The geopolymer theory is a fringe but testable hypothesis. It has some scientific backing, but the consensus remains that the stones are natural, quarried and carved.

Sources

  1. Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. - Geopolymer Institute

Sources are external and provided for verification. Listing does not imply the Observer endorses their claims.