picriten.

Brit.

/ˈpɪkrʌɪt/, U.S.

/ˈpɪˌkraɪt/

Forms: 1800s picryte (in sense 2), 1800s pikrite (in sense 2), 1800s– picrite.

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

Etymology: < ancient Greek πικρός bitter (see picro- comb. form) + -ite suffix¹. In sense 1 after German Picrites (J. F. Blumenbach Handb. der Naturgeschichte (ed. 5, 1797) xii. 584). In sense 2 after German Pikrit (G. Tschermak 1866, in Sitzungsber. der Kaiserlichen Akad. der Wissensch. (Math.-Nat. Classe) 53 262).

†1. Mineralogy. = dolomite n. Obsolete. rare.

ΘΚΠ

the world > the earth > minerals > types of mineral > carbonates > [noun] > hexagonal > dolomite

dolomite1794

picrite1814

the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > marble > others

Florentine marble1706

Carraraa1728

rosso antico1730

giallo antico1741

campan1794

dolomite1794

ruin marble1798

turquin1811

picrite1814

landscape marble1816

snow1848

Irish green1850

palombino1859

Tennessee marble1875

corallite1883

stalagmite marble1895

Piastraccia1909

1814 T. Allan Mineral. Nomencl. 9 Crystallized muricalcite, bitterspath, picrite.

1836 T. Thomson Outl. Mineral. I. 181 Calcareo-carbonate of Magnesia. Dolomite—conite—..muricalcite—pearl spar—picrite [etc.].

1896 A. H. Chester Dict. Names Minerals Picrite, an obs. syn. of dolomite, bitter-spar.

2. Geology. A dark ultrabasic igneous rock, generally hypabyssal, containing a substantial amount of olivine together with augite and other ferromagnesian minerals and a small amount of plagioclase.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > hypabyssal rocks

picrite1868

tinguaite1890

grorudite1896

hedrumite1896

heumite1901

plumasite1903

ophiolite1937

1868 J. D. Dana Syst. Mineral. (ed. 5) 258 A chrysolite rock occurring at L. Lherz, consisting largely of chrysolite, has been called Lherzolyte... Another similar rock from Moravia, called picryte, consists half of chrysolite, along with feldspar, diallage, hornblende, and magnetite.

1882 A. Geikie Text-bk. Geol. 151 Olivine Rocks... The following are the more important species:—Pikrite, a rock rich in olivine, usually more or less serpentinized, with augite, magnetite, or ilmenite, and a little brown biotite, hornblende, or apatite; [etc.].

1931 S. J. Shand Study of Rocks vii. 112 Picrites with forty to seventy-five per cent. of olivine have been described in Skye.

1976 Mineral. Mag. 40 683 Exposures of baked siltstone occur on top of the ridge with picrite exposed only on the scarp face.

2003 Nature 16 Jan. 249 Oceanic crust in the early Archaean..would probably have consisted of magnesium-rich picrite.

Derivatives

piˈcritic adj. Geology containing or of the nature of picrite ( 2).

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > hypabyssal > varieties of

ophiolitic1909

picritic1931

1931 Amer. Jrnl. Sci. 221 403 Even a picritic sub-basalt..exhibits some interstitial quartz.

1958 Trans. Royal Soc. Edinb. 63 459 It is proposed to use the term ‘picritic’ to denote, in minor intrusions and lavas, an amount of forsteritic olivine considerably beyond that which normally crystallizes in basaltic magma. This amount of olivine varies between 25 and 60 per cent.

1965 Carnegie Inst. Year Bk. 1964 126/2 In general, picritic lavas and hypabyssal intrusives are few in number and restricted to the lower parts of both oceanic and continental volcanic columns.

1993 Jrnl. Petrol. 34 682 Berg (1980) interpreted the Snowflake Troctolite Zone in the Hettasch Intrusion, Labrador, as representing a quench of picritic magma emplaced along the floor of a leucotroctolite magma chamber.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	picrite
释义	picriten. Brit. /ˈpɪkrʌɪt/, U.S. /ˈpɪˌkraɪt/ Forms: 1800s picryte (in sense 2), 1800s pikrite (in sense 2), 1800s– picrite. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πικρός , -ite suffix¹. Etymology: < ancient Greek πικρός bitter (see picro- comb. form) + -ite suffix¹. In sense 1 after German Picrites (J. F. Blumenbach Handb. der Naturgeschichte (ed. 5, 1797) xii. 584). In sense 2 after German Pikrit (G. Tschermak 1866, in Sitzungsber. der Kaiserlichen Akad. der Wissensch. (Math.-Nat. Classe) 53 262). †1. Mineralogy. = dolomite n. Obsolete. rare. ΘΚΠ the world > the earth > minerals > types of mineral > carbonates > [noun] > hexagonal > dolomite dolomite1794 picrite1814 the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > marble > others Florentine marble1706 Carraraa1728 rosso antico1730 giallo antico1741 campan1794 dolomite1794 ruin marble1798 turquin1811 picrite1814 landscape marble1816 snow1848 Irish green1850 palombino1859 Tennessee marble1875 corallite1883 stalagmite marble1895 Piastraccia1909 1814 T. Allan Mineral. Nomencl. 9 Crystallized muricalcite, bitterspath, picrite. 1836 T. Thomson Outl. Mineral. I. 181 Calcareo-carbonate of Magnesia. Dolomite—conite—..muricalcite—pearl spar—picrite [etc.]. 1896 A. H. Chester Dict. Names Minerals Picrite, an obs. syn. of dolomite, bitter-spar. 2. Geology. A dark ultrabasic igneous rock, generally hypabyssal, containing a substantial amount of olivine together with augite and other ferromagnesian minerals and a small amount of plagioclase. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > hypabyssal rocks picrite1868 tinguaite1890 grorudite1896 hedrumite1896 heumite1901 plumasite1903 ophiolite1937 1868 J. D. Dana Syst. Mineral. (ed. 5) 258 A chrysolite rock occurring at L. Lherz, consisting largely of chrysolite, has been called Lherzolyte... Another similar rock from Moravia, called picryte, consists half of chrysolite, along with feldspar, diallage, hornblende, and magnetite. 1882 A. Geikie Text-bk. Geol. 151 Olivine Rocks... The following are the more important species:—Pikrite, a rock rich in olivine, usually more or less serpentinized, with augite, magnetite, or ilmenite, and a little brown biotite, hornblende, or apatite; [etc.]. 1931 S. J. Shand Study of Rocks vii. 112 Picrites with forty to seventy-five per cent. of olivine have been described in Skye. 1976 Mineral. Mag. 40 683 Exposures of baked siltstone occur on top of the ridge with picrite exposed only on the scarp face. 2003 Nature 16 Jan. 249 Oceanic crust in the early Archaean..would probably have consisted of magnesium-rich picrite. Derivatives piˈcritic adj. Geology containing or of the nature of picrite ( 2). ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > hypabyssal > varieties of ophiolitic1909 picritic1931 1931 Amer. Jrnl. Sci. 221 403 Even a picritic sub-basalt..exhibits some interstitial quartz. 1958 Trans. Royal Soc. Edinb. 63 459 It is proposed to use the term ‘picritic’ to denote, in minor intrusions and lavas, an amount of forsteritic olivine considerably beyond that which normally crystallizes in basaltic magma. This amount of olivine varies between 25 and 60 per cent. 1965 Carnegie Inst. Year Bk. 1964 126/2 In general, picritic lavas and hypabyssal intrusives are few in number and restricted to the lower parts of both oceanic and continental volcanic columns. 1993 Jrnl. Petrol. 34 682 Berg (1980) interpreted the Snowflake Troctolite Zone in the Hettasch Intrusion, Labrador, as representing a quench of picritic magma emplaced along the floor of a leucotroctolite magma chamber. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1814
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