The smaller andesite blocks that were used for stone facing and carvings came from quarries within the Copacabana Peninsula about 90 kilometers away from across Lake Titicaca. Photo credit Based on circumstantial evidences, it can be argued that Puma punku was never built by the Tiwanaku, but by a civilization that was more advanced.
Perhaps the carbon dating results were wrong due to contamination of the samples, or that Puma punku was built by another civilization that came across the ocean, built the complex and left.
The red sandstone and andesite stones were cut in such a precise way that it’s as if they were cut using a diamond tool, and they can fit perfectly into and lock with each other.
The temple’s origin is a mystery, but based on carbon dating of organic material found on site, archeologists believe the complex may have been built by the Tiwanaku empire - one of the most important civilization prior to the Inca Empire – that flourished between 3 AD.
They were initially pounded by stone hammers—which can still be found in numbers on local andesite quarries—, creating depressions, and then slowly ground and polished with flat stones and sand The stones are of mammoth proportion.
The largest of these blocks is 25.6 feet long, 17 feet wide and 3.5 feet thick, and is estimated to weigh 131 metric tons.
The most intriguing thing about Puma punku is the stonework.
Puma punku was a terraced earthen mound originally faced with megalithic blocks, each weighing several tens of tons.