What does cherty mean?
Cherty is an adjective used chiefly in geology to describe rock, sediment, soil, or another material that contains chert or has chert-like qualities. Chert is a hard, fine-grained rock made chiefly of microcrystalline silica, and a cherty formation may include chert nodules, replacement patches, or a distinctly siliceous texture. The word is useful because it distinguishes materials that look similar on a weathered surface but differ in composition and likely durability. In field descriptions, cherty can also suggest resistance to erosion, though context determines which features are emphasized. It is specialized rather than ornamental: most general readers will encounter it in geology, archaeology, soil science, or mining, not everyday conversation. Used carefully, it conveys more than a generic implication of hardness or flintiness because it names a specific siliceous rock and its presence within another material.
adjectiveContaining chert, or having the hard, silica-rich character of chert. The term is chiefly used in geology, soil science, and related fields.
- Containing chert or possessing a hard, siliceous, chert-like character.
"The cliffs are cherty, with bands of dark flint running through pale limestone."
"The cliffs are cherty, with bands of dark flint running through pale limestone."
"The fossil-bearing beds are cherty, containing nodules of hard microcrystalline silica."
Cherty is geology's way of flagging a rock's hidden flinty backbone.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does cherty come from?
Cherty is an English adjective formed from chert with the suffix -y. Chert itself is attested in Middle English and is generally traced to Old English ceort, a word associated with flint or hard stone, although its deeper origins are less certain. The suffix -y has long been used in English to form adjectives indicating the nature, character, or presence of a substance.
How cherty is actually used
Chiefly a geological and related technical adjective, uncommon in general prose. It characteristically describes a material as containing chert or having a chert-like texture and may also suggest hardness or resistance to erosion.
Easily confused with cherty
Chert is the hard, fine-grained, silica-rich rock itself; cherty is the adjective describing a material that contains chert or resembles it.