Lake Ontariogreenspun.com : LUSENET : Introductory Geology, Oswego State : One Thread
I was walking along the breakers a few weeks ago, and I notcied that pits in the rocks that held water were stained red. How does that happen, I guess what I'm really asking is what is in the water to make that happen?
-- Chan'non Goodrich (email@example.com), May 04, 2001
I'm not sure what the pits are in the rock, but i think that the breakers are made of cement which is held together with metal rods in throuh out the slab. If this is the case then the pits are made by the chemical wheathering of the rods. In the process of Iron- oxidation water with a slightly higher acid ph would erode and the product would a brownish red coloration near the hole.
-- james clark (firstname.lastname@example.org), May 04, 2001.