psammiten.

Brit.

/ˈsamʌɪt/, U.S.

/ˈsæmaɪt/

Origin: A borrowing from French. Etymon: French psammite.

Etymology: < French psammite ( A. Brongniart Traité élém. de minéral. (1807) I. 288) < ancient Greek ψάμμος sand (see psammo- comb. form) + French -ite -ite suffix¹. Compare Hellenistic Greek ψαμμίτης from sand. N.E.D. (1909) also gives the pronunciation (psæ·məit) /ˈpsæmaɪt/.

Geology.

Originally: †a fine or smooth-grained sandstone (obsolete). In later use: a sedimentary rock composed of medium-sized particles (commonly defined as those with a diameter between ¹/ ₁₆ mm and either 2 or 4 mm); (also) a metamorphic derivative of a sandstone.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > of medium sized particles

psammite1882

the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other sedimentaries

dunstonea1613

rock phosphate1852

psammite1882

tillite1907

flowstone1925

tilloid1931

turbidite1957

the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > other metamorphics

quartzite1823

mica-schist1826

amphibolite1833

hornfels1854

phthanite1854

hornblendite1874

psammite1882

tourmaline-rock1882

tourmaline-schist1882

jasperoid1898

skarn1901

metagabbro1904

metabasite1907

verdite1908

rodingite1911

siallite1933

tonstein1961

greenlandite1981

1817 Amer. Reg. 1 444/1 Micaceous Psammite or sandstone of the coal formation.

1823 tr. A. von Humboldt Geognostical Ess. Superposition Rocks 201 When the word grauwacke (tromate of M. d'Aubuisson, ancient psammite, and quartzose mimophyre of M. Brongniart) is used in a more confined sense, it is applied to the arenaceous transition rocks.

1837 J. T. Smith in tr. L. J. Vicat Pract. & Sci. Treat. Mortars & Cements Pref. 9 Other words, used for the purpose of defining substances hitherto classed by us under a more general category..such as ‘arenes’, ‘psammites’, &c., I have thought it advisable to convert at once into English terms.

1882 A. Geikie Text-bk. Geol. 154 (heading) Gravel and sand rocks (psammites).

1912 H. B. Woodward Geol. Soils & Substrata 49 Some varieties of fine-grained sandstone, with clayey matrix and usually micaceous, are termed Psammites.

1958 S. J. De Laet Low Countries 225 Bos primigenius and deer engraved on a broken slab of sandstone (psammite) from the Trou de Châleux (prov. Namur).

2000 Science 26 May 1414/1 The ‘pelite’ grades from a quartz-rich (86% SiO₂) psammite at the contact to a more typical pelite within ~10cm.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	psammite
释义	psammiten. Brit. /ˈsamʌɪt/, U.S. /ˈsæmaɪt/ Origin: A borrowing from French. Etymon: French psammite. Etymology: < French psammite ( A. Brongniart Traité élém. de minéral. (1807) I. 288) < ancient Greek ψάμμος sand (see psammo- comb. form) + French -ite -ite suffix¹. Compare Hellenistic Greek ψαμμίτης from sand. N.E.D. (1909) also gives the pronunciation (psæ·məit) /ˈpsæmaɪt/. Geology. Originally: †a fine or smooth-grained sandstone (obsolete). In later use: a sedimentary rock composed of medium-sized particles (commonly defined as those with a diameter between ¹/ ₁₆ mm and either 2 or 4 mm); (also) a metamorphic derivative of a sandstone. ΘΚΠ the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > of medium sized particles psammite1882 the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other sedimentaries dunstonea1613 rock phosphate1852 psammite1882 tillite1907 flowstone1925 tilloid1931 turbidite1957 the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > other metamorphics quartzite1823 mica-schist1826 amphibolite1833 hornfels1854 phthanite1854 hornblendite1874 psammite1882 tourmaline-rock1882 tourmaline-schist1882 jasperoid1898 skarn1901 metagabbro1904 metabasite1907 verdite1908 rodingite1911 siallite1933 tonstein1961 greenlandite1981 1817 Amer. Reg. 1 444/1 Micaceous Psammite or sandstone of the coal formation. 1823 tr. A. von Humboldt Geognostical Ess. Superposition Rocks 201 When the word grauwacke (tromate of M. d'Aubuisson, ancient psammite, and quartzose mimophyre of M. Brongniart) is used in a more confined sense, it is applied to the arenaceous transition rocks. 1837 J. T. Smith in tr. L. J. Vicat Pract. & Sci. Treat. Mortars & Cements Pref. 9 Other words, used for the purpose of defining substances hitherto classed by us under a more general category..such as ‘arenes’, ‘psammites’, &c., I have thought it advisable to convert at once into English terms. 1882 A. Geikie Text-bk. Geol. 154 (heading) Gravel and sand rocks (psammites). 1912 H. B. Woodward Geol. Soils & Substrata 49 Some varieties of fine-grained sandstone, with clayey matrix and usually micaceous, are termed Psammites. 1958 S. J. De Laet Low Countries 225 Bos primigenius and deer engraved on a broken slab of sandstone (psammite) from the Trou de Châleux (prov. Namur). 2000 Science 26 May 1414/1 The ‘pelite’ grades from a quartz-rich (86% SiO₂) psammite at the contact to a more typical pelite within ~10cm. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1817
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