[Bob Ireland]

***One of the problems people have is that these drill holes and cuts have never been dated***

A good point, one that has occurred to me. Also, geopolymer molding does not explain the existence of the holes... one does not 'mold' a hole without a (removable) form of some kind inserted... and perfectly round and perfectly spaced?

And what sort of mold did they use to form the 'H' blocks with such perfectly smooth sides and perfectly square rabbets? Surely not wood - of which there was little available on the alto-plano - hand-hewn.

[SunkenCiv]

There’s no reason whatsoever a hole could not have been included in the design. Using molds to form those Pumapunku structures was feasible, obviously leaving a hole would be just as simple.

Here’s something I was looking for, my memory isn’t what it used to be.

http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting05.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide05.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting07.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide07_2.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting08.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide08_1.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide08_2.jpg