chertn.

Brit.

/tʃəːt/, U.S.

/tʃɛ(ə)rt/

Forms: Also 1600s–1700s chirt.

Etymology: Apparently a local term, which has been taken into geological use. Origin not ascertained. Prof. Skeat compares Kentish place-names like Brasted Chart; but this chart is explained by Parish and Shaw as ‘a rough common overrun with gorse, broom, bracken, etc.’, whence charty rough uncultivated (land).

A form of amorphous silica found in several varieties, e.g. flint.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > stone > [noun] > hard stone > chert

chert1686

hornstone1728

horn-flint1803

taconite1905

the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > quartz > cryptocrystalline quartz > chert

chert1686

hornstone1728

1686 R. Plot Nat. Hist. Staffs. iii. 124 A sort of black Chalk found between the beds of Chirts, and the beds of gray Marble.

1730 J. Martyn in Philos. Trans. 1729–30 (Royal Soc.) 36 30 Chert, this is a kind of Flint..called so, when it is found in thin Strata.

1730 Philos. Trans. 1729–30 (Royal Soc.) 36 30 The Strata of Chert are often four Yards thick.

1747 W. Hooson Miners Dict. sig. Eivb Attended with small Chirts, Cauks, etc. according to the Nature of the Vein.

1813 R. Bakewell Introd. Geol. (1815) 211 Seams of siliceous earth, called chert, which nearly resembles flint.

1853 C. Lyell Princ. Geol. Gloss. Chert A gradual passage from chert to limestone is not uncommon.

1868 J. D. Dana Min. (1880) 195.

Compounds

attributive and in other combinations.

ΚΠ

1863 Reader 14 Feb. Flint and chert implements were found in much lower positions.

1865 Daily Tel. 3 Nov. 5/4 The ‘mill-room’ in which huge chertstones are shoved round by iron arms.

1888 Jrnl. Derbysh. Archæol. Soc. The skeleton lay upon a bed of chert-fragments.

This entry has not yet been fully updated (first published 1889; most recently modified version published online March 2022).

单词	chert
释义	chertn. Brit. /tʃəːt/, U.S. /tʃɛ(ə)rt/ Forms: Also 1600s–1700s chirt. Etymology: Apparently a local term, which has been taken into geological use. Origin not ascertained. Prof. Skeat compares Kentish place-names like Brasted Chart; but this chart is explained by Parish and Shaw as ‘a rough common overrun with gorse, broom, bracken, etc.’, whence charty rough uncultivated (land). A form of amorphous silica found in several varieties, e.g. flint. ΘΚΠ the world > the earth > structure of the earth > constituent materials > stone > [noun] > hard stone > chert chert1686 hornstone1728 horn-flint1803 taconite1905 the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > quartz > cryptocrystalline quartz > chert chert1686 hornstone1728 1686 R. Plot Nat. Hist. Staffs. iii. 124 A sort of black Chalk found between the beds of Chirts, and the beds of gray Marble. 1730 J. Martyn in Philos. Trans. 1729–30 (Royal Soc.) 36 30 Chert, this is a kind of Flint..called so, when it is found in thin Strata. 1730 Philos. Trans. 1729–30 (Royal Soc.) 36 30 The Strata of Chert are often four Yards thick. 1747 W. Hooson Miners Dict. sig. Eivb Attended with small Chirts, Cauks, etc. according to the Nature of the Vein. 1813 R. Bakewell Introd. Geol. (1815) 211 Seams of siliceous earth, called chert, which nearly resembles flint. 1853 C. Lyell Princ. Geol. Gloss. Chert A gradual passage from chert to limestone is not uncommon. 1868 J. D. Dana Min. (1880) 195. Compounds attributive and in other combinations. ΚΠ 1863 Reader 14 Feb. Flint and chert implements were found in much lower positions. 1865 Daily Tel. 3 Nov. 5/4 The ‘mill-room’ in which huge chertstones are shoved round by iron arms. 1888 Jrnl. Derbysh. Archæol. Soc. The skeleton lay upon a bed of chert-fragments. This entry has not yet been fully updated (first published 1889; most recently modified version published online March 2022). < n.1686
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