Origin of chert
Examples from the Web for chert
Historical Examples of chert
Seven specimens were of basalt and one each of chert and porphyry.The Topanga Culture Final Report on Excavations, 1948
A. E. Treganza
The chert has sometimes the appearance of calcedony, and is finely striped.
In the same limestone there are enormous beds of chert, agates, and carnelians.Canyons of the Colorado
J. W. Powell
Nodules and layers of "chert" (an impure kind of flint) occur in it, whilst in places it forms a hard rock called "firestone."Sea-Weeds, Shells and Fossils
Limestones lose their calcium carbonate by solution, leaving only clay with fragments of quartz or chert as impurities.The Economic Aspect of Geology
C. K. Leith
Word Origin for chert
"flint-like quartz," 1670s, of unknown origin. Apparently "a local term, which has been taken into geological use" [OED].