ruditen.

Brit.

/ˈruːdʌɪt/, U.S.

/ˈruˌdaɪt/

Forms: 1900s– rudite, 1900s– rudyte.

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin rūdus , -ite suffix¹.

Etymology: < classical Latin rūdus (see rudera n.) + -ite suffix¹.

Geology.

Any clastic sedimentary rock composed of grains coarser than sand, i.e. greater than 2 mm (approx. ¹/ ₁₀ inch) in diameter. Cf. rudaceous adj., psephite n.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > composite rock > [noun] > conglomerate > specific

pinnel1766

grauwacke1794

unguilite1799

greywacke1805

yolky-stone1805

nagelfluh1808

coombe rock1822

pebble bed1849

breccia1856

ceppo1881

banket1886

ouklip1892

crush-conglomerate1893

basal conglomerate1900

calcrete1902

rudite1904

fanglomerate1912

beach-rock1919

1904 A. W. Grabau in Amer. Geologist 33 242 The consolidated rock whether conglomerate or breccia may be called a rudyte.

1935 Bull. Nat. Res. Council (U.S.) 98 239 Rudite. This is a general term..for fragmental sedimentary rocks coarser than sand grains.

1966 B. Simpson Rocks & Minerals xvii. 174 The quartz-rich rudites are quartz conglomerates and quartz breccias.

2005 A. Pentecost Travertine iv. 69 Cemented rudites are also found on coasts, where calcium bicarbonate groundwater seepage occurs onto shingle banks.

This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).

单词	rudite
释义	ruditen. Brit. /ˈruːdʌɪt/, U.S. /ˈruˌdaɪt/ Forms: 1900s– rudite, 1900s– rudyte. Origin: A borrowing from Latin, combined with an English element. Etymons: Latin rūdus , -ite suffix¹. Etymology: < classical Latin rūdus (see rudera n.) + -ite suffix¹. Geology. Any clastic sedimentary rock composed of grains coarser than sand, i.e. greater than 2 mm (approx. ¹/ ₁₀ inch) in diameter. Cf. rudaceous adj., psephite n. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > composite rock > [noun] > conglomerate > specific pinnel1766 grauwacke1794 unguilite1799 greywacke1805 yolky-stone1805 nagelfluh1808 coombe rock1822 pebble bed1849 breccia1856 ceppo1881 banket1886 ouklip1892 crush-conglomerate1893 basal conglomerate1900 calcrete1902 rudite1904 fanglomerate1912 beach-rock1919 1904 A. W. Grabau in Amer. Geologist 33 242 The consolidated rock whether conglomerate or breccia may be called a rudyte. 1935 Bull. Nat. Res. Council (U.S.) 98 239 Rudite. This is a general term..for fragmental sedimentary rocks coarser than sand grains. 1966 B. Simpson Rocks & Minerals xvii. 174 The quartz-rich rudites are quartz conglomerates and quartz breccias. 2005 A. Pentecost Travertine iv. 69 Cemented rudites are also found on coasts, where calcium bicarbonate groundwater seepage occurs onto shingle banks. This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022). < n.1904
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