cherty

comparative chertier · superlative chertiest

1. chemistryContaining chert.

   Rudely shaped, of hard cherty rock, flat on the inner face, convex on the back. 2759.

   1879, James Stevenson, Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879

   2 more examples

   Its mineralogical constitution is not simple; in some parts the rock is of a cherty, in others of a feldspathic nature, including thin veins of serpentine.

   1913, Charles Darwin, A Naturalist's Voyage Round the World

   It is represented by a phosphate-dolostone sequence in Wengan, where it is 33 to 55 m thick and consists mainly of dark phosphate, cherty phosphate, chert, and gray dolomite.

   1998 February 6, Chia-Wei Li et al., “Precambrian Sponges with Cellular Structures”, in Science, volume 279, number 5352, →DOI, pages 879–882