posted on Apr, 5 2013 @ 09:36 AM
reply to post by aires
Just recently I was visiting Saltos del Laja, in Chile. A large waterfall that falls over a dense rather even composite layer of rock with soft mud
under and above the rock layer. Easy to see when looking at the falls with low water flow. The water flow cuts vertical lines into the stone and
undercuts the mud layer removing support. With time, the stone can no longer stay at the top, it break off and falls adding to a pile of unusually
cubic looking collection of rocks below the falls. Many blocks about 2.5 meter cubic in form.
Also Search: Saltos del Laja, images and scroll thru the photos. I have photos as well but having difficulty posting, sorry. I think simple physics
would explain why these rocks tend to break off at certain lengths.
Here is an example of nature providing building blocks. Ready to drag off, chip or grind to fit.
I don't think it would take much effort to guide erosion (cutting of the blocks widths) from above the falls when water levels are low letting nature
do most of the work. Which means searching for an ancient quarry should be expanded to include not only open type quarries but also river beds or
ancient water flows.
edit on 5-4-2013 by Lydia because: (no reason given)
edit on 5-4-2013 by Lydia because: (no reason
edit on 5-4-2013 by Lydia because: spelling