The Internet Archive has a preservation copy of this work in our general collections.
On the flexibility of itacolumite
1884
American Journal of Science
HAVING had many occasions for observing the extensive series of quartzose rockf! known as itacolumite in t.he gold and diamond regions of Minas Gernes, Brazil, I have for some time entertained a suspicion that the peculiar property of flexibility would on investigation be fonnd to be only a surface character. I have already shown (this Journal, vol. xxvi, p. 34) that much of the so·called itacolumite belongs to a higher geological horizon than that containing the flexible layers and that in the
doi:10.2475/ajs.s3-28.165.203
fatcat:e5bcatovqvgrtctfohqtcslkse