Peruvian megalithic walls show shallow, random scraping marks on crystalline stone blocks. Research has examined whether the material represents natural stone or a geopolymer composite. The marks lack functional construction purpose—unlike Aswan's excavation marks. Two different techniques appear at work in ancient megalithic construction.
Key facts claimed:
- Peruvian scoop marks are on hard crystalline stones like green diorite, not softer limestone
- Marks are shallow, superficial, and appear randomly on some blocks
- No functional purpose for construction - not excavation marks
- Appearance resembles scraping marks on uncured concrete
- Researchers have investigated whether the block material could be a geopolymer or grown crystalline matrix