The surface texture is weathering because of acid rain. Sulfur dioxide, an acid rain precursor, can react directly with limestone in the presence of water to form gypsum, which eventually flakes off or is dissolved by water. In addition, acid rain can dissolve limestone and marble through direct contact.
The carvings are still very mysterious and everywhere in Peru, especially in the Sacred Valley.
Thumbing through The Stones of Tiahuanaco last night and read the part where Protzen explains that the top of the H Block is actually the bottom of the niche shape that is found on stones all over the site (and in miniature inside the block). It just lost the top stone that completes the shape.
Interesting how the bottom of the block has a less ornate niche with the corresponding shape in miniature inside it as well.
Levels of ascension?
Inca were a small upper class of elites. They imported the labor (and skill) from all over the region. Even then, people were working with stone in Peru for thousands of years before the inca so many buildings could have been inherited. It's a great mystery that will never be solved!
They must of had ingenious techniques to do what they did! We are the uneducated people saying it must have been magic or aliens.
Makes me question what advanced technology really is when a culture can make megaliths that last thousands of years with nothing but what they find laying around.
@Megalithic12000 Is there any documentation of this theory in the older Spanish accounts of Peru or is this a new idea? I know Ben said that a guide (I don’t know his name) originally came up with this classification system. Is it based in any historic accounts?