See also:

• THERALITE (Gk. 9rlpav, to pursue)

THERALITE (Gk. 9rlpav, to pursue)  , in See also:

• PETROLOGY

petrology, a See also:

• GROUP

group of plutonic holocrystalline rocks consisting of See also:

• NEPHELINE

nepheline, basic See also:

• PLAGIOCLASE

plagioclase, See also:

• AUGITE

augite and See also:

• OLIVINE

olivine, and so called because it is of rare occurrence, and its See also:

• DISCOVERY

discovery was looked forward to with See also:

• INTEREST

interest as' completing the See also:

• SERIES (a Latin word from serere, to join)

series of basic rocks containing nepheline as an essential constituent . The felspars are mostly of basic See also:

• CHARACTER (Gr. xapareri7p, from xap&crew, to scratch)

character and are often zonal; the nepheline is of later See also:

• CRYSTALLIZATION

crystallization, rarely idiomorphic and often decomposed . See also:

• PYROXENE

Pyroxene in these rocks may be of See also:

• GREEN, A
• GREEN, ALEXANDER HENRY (1832—1896)
• GREEN, DUFF (1791—1875)
• GREEN, JOHN RICHARD (1837—1883)
• GREEN, MATTHEW (1696-1737)
• GREEN, THOMAS HILL (1836-1882)
• GREEN, VALENTINE (1739–1813)
• GREEN, WILLIAM HENRY (.1825–1900)

green See also:

• COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour or purplish-See also:

• BROWN
• BROWN, CHARLES BROCKDEN (1771-181o)
• BROWN, FORD MADOX (1821-1893)
• BROWN, FRANCIS (1849- )
• BROWN, GEORGE (1818-188o)
• BROWN, HENRY KIRKE (1814-1886)
• BROWN, JACOB (1775–1828)
• BROWN, JOHN (1715–1766)
• BROWN, JOHN (1722-1787)
• BROWN, JOHN (1735–1788)
• BROWN, JOHN (1784–1858)
• BROWN, JOHN (1800-1859)
• BROWN, JOHN (1810—1882)
• BROWN, JOHN GEORGE (1831— )
• BROWN, ROBERT (1773-1858)
• BROWN, SAMUEL MORISON (1817—1856)
• BROWN, SIR GEORGE (1790-1865)
• BROWN, SIR JOHN (1816-1896)
• BROWN, SIR WILLIAM, BART
• BROWN, THOMAS (1663-1704)
• BROWN, THOMAS (1778-1820)
• BROWN, THOMAS EDWARD (1830-1897)
• BROWN, WILLIAM LAURENCE (1755–1830)

brown and See also:

• RICH, BARNABE (c. 1540-1617)
• RICH, CLAUDIUS JAMES (1787-1821)
• RICH, JOHN (1692-1761)
• RICH, PENELOPE, LADY (c. 1562–1607)
• RICH, RICHARD, 1ST BARON RICH (1490?-1567)

rich in See also:

• TITANIUM [symbol Ti, atomic weight 48.1 (0 = 16)]

titanium; olivine is usually abundant . Among the accessories may be mentioned See also:

• APATITE

apatite and See also:

• IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron oxides, See also:

• BIOTITE

biotite and dark brown See also:

• HORNBLENDE

hornblende, the latter often surrounding the See also:

• PURPLE

purple augite . The rocks have rarely ophitic structure, but their minerals tend to have See also:

• GOOD, JOHN MASON (1764-1827)

good crystalline See also:

• FORM (Lat. forma)

form, except in the See also:

• CASE
• CASE, JOHN (d. 1600)

case of nepheline and See also:

• ORTHOCLASE

orthoclase (if that be See also:

• PRESENT

present) . By decomposition the nepheline yields See also:

• ZEOLITES

zeolites such as See also:

• NATROLITE

natrolite and See also:

• ANALCITE

analcite . The theralites are rarely See also:

• CROSS

cross-grained and have much resemblance to dolerites in See also:

• HAND
• HAND (a word common to Teutonic languages; cf. Ger. Hand, Goth. handus)
• HAND, FERDINAND GOTTHELF (1786-185r)

hand specimens . Among localities for these rocks are Duppau in central Bohemia, Pridazzo (W . See also:

• ALPS

Alps), Umptek (on the See also:

• WHITE
• WHITE, ANDREW DICKSON (1832– )
• WHITE, GILBERT (1720–1793)
• WHITE, HENRY KIRKE (1785-1806)
• WHITE, HUGH LAWSON (1773-1840)
• WHITE, JOSEPH BLANCO (1775-1841)
• WHITE, RICHARD GRANT (1822-1885)
• WHITE, ROBERT (1645-1704)
• WHITE, SIR GEORGE STUART (1835– )
• WHITE, SIR THOMAS (1492-1567)
• WHITE, SIR WILLIAM ARTHUR (1824--1891)
• WHITE, SIR WILLIAM HENRY (1845– )
• WHITE, THOMAS (1628-1698)
• WHITE, THOMAS (c. 1550-1624)

White See also:

• SEA (in O. Eng. sae, a common Teutonic word; cf. Ger. See, Dutch Zee, &c.; the ultimate source is uncertain)
• SEA, COMMAND OF THE

Sea), See also:

• MADAGASCAR

Madagascar and the Crazy Mountains in See also:

• MONTANA

Montana . A variety of See also:

• THERALITE (Gk. 9rlpav, to pursue)

theralite occurs also at See also:

• MONTREAL

Montreal in See also:

• CANADA

Canada, and rocks from See also:

• CRAWFORD, EARLS OF
• CRAWFORD, FRANCIS MARION (1854–1909)
• CRAWFORD, THOMAS (1814–1857)
• CRAWFORD, WILLIAM HARRIS (1772–1834)

Crawford See also:

• JOHN
• JOHN (1167–1216)
• JOHN (1290-c. 1320)
• JOHN (1296-1346)
• JOHN (1371–1419)
• JOHN (1468-1532)
• JOHN (1801-1873)
• JOHN (Heb. llni')
• JOHN (ZAPOLYA) (1487-1540)
• JOHN, 4TH MARQUESS OF TWEEDDALE (c. 1695-1762)
• JOHN, DON (1545-1578)
• JOHN, DON (1629–1679)
• JOHN, GOSPEL OF ST
• JOHN, or HAYS (1513–1571)
• JOHN, THE APOSTLE
• JOHN, THE EPISTLES OF

John in See also:

• LANARKSHIRE

Lanarkshire and from See also:

• PAISLEY
• PAISLEY, CLAUD HAMILTON, LORD (c. 1543-1622)

Paisley in See also:

• RENFREW

Renfrew-See also:

• SHIRE

shire have recently been ascribed to this group . Very See also:

• CLOSE
• CLOSE (from Lat. clausum, shut)
• CLOSE, MAXWELL HENRY (1822-1903)

close to the theralites is a series of See also:

• ROCK
• ROCK (O.Fr. rake, Sp. rota, Ital. rocca; possibly from a Lat. form rupica, from rupes, rock)
• ROCK, DANIEL (1799–187t)

rock types known as the teschenites (from See also:

• TESCHEN (Czech, Tesin; Polish, Cieszyn)

Teschen in See also:

• MORAVIA (Ger., Ma/wen; Czech, Morava)

Moravia) . Instead of nepheline these rocks usually contain analcite, and from their microscopic characters it is by no means likely that the analcite is secondary after nepheline in this case; it appears, in fact, to be either See also:

• PRIMARY

primary or of pneumatolytic origin .

Nepheline, however, has been found in teschenites from See also:

• PORTUGAL

Portugal and from Moravia, so that the distinction between the two series practically vanishes . In central See also:

• SCOTLAND
• SCOTLAND, CHURCH OF
• SCOTLAND, EPISCOPAL CHURCH OF

Scotland, around See also:

• EDINBURGH

Edinburgh and See also:

• GLASGOW

Glasgow, teschenites are abundant, forming thick sills intrusive into the Carboniferous rocks, and some are also known from See also:

• LEICESTERSHIRE

Leicestershire (Whitwick) and from See also:

• ARRAN
• ARRAN, EARLS OF

Arran . These teschenites are sometimes ophitic and'present transitions to olivine-diabases on the one hand and to picrites on the other . They are the deep-seated representatives of the basaltic lavas which were emitted in See also:

• GREAT

great See also:

• NUMBERS, BOOK OF
• NUMBERS, PARTITION OF

numbers in the See also:

• EARLY
• EARLY, JUBAL ANDERSON (1816-1894)

early See also:

• PART

part of the Carboniferous See also:

• PERIOD
• PERIOD (Gr. irepioSos, a going or way round, circuit, aepi, round, and &Sis, way, road)

period . Other localities for teschenite are the See also:

• CAUCASUS

Caucasus and the See also:

• COAST (from Lat. costa, a rib, side)

coast of See also:

• CALIFORNIA
• CALIFORNIA, LOWER (Baja California)
• CALIFORNIA, UNIVERSITY OF

California (Cuyama Valley, &c.) . The essexites are an allied series containing a larger amount of See also:

• ALKALI

alkali See also:

• FELSPAR, or FELDSPAR

felspar . Nepheline also occurs by no means uncommonly; the augite is sometimes green, but in other specimens is of a rich purple colour with well-marked zonal structure . Olivine is by no means uncommon, and brown hornblende and biotite occur rather frequently . The type rock is from See also:

• ESSEX
• ESSEX, ARTHUR CAPEL
• ESSEX, EARLS OF
• ESSEX, KINGDOM OF
• ESSEX, ROBERT DEVEREUX
• ESSEX, ROBERT DEVEREUX, 2ND2 EARL OF (1566-1601)
• ESSEX, WALTER DEVEREUX, IST2 EARL OF (1541–1576)

Essex (See also:

• MASSACHUSETTS (an Indian name, originally applied to a tribe of Indians)

Massachusetts) and other examples have been described from Rongstock on the See also:

• ELBE (the Albis of the Romans and the Labe of the Czechs)

Elbe, from See also:

• MOUNT, WILLIAM SIDNEY (1807-1868)

Mount Royal (Montreal), from S . See also:

• NORWAY
• NORWAY (Norge)

Norway, near See also:

• CHRISTIANIA (officially KRISTIANIA)

Christiania, and from St See also:

• VINCENT (or VINCENTIUS), ST
• VINCENT, GEORGE (1796-1831?)
• VINCENT, MARY ANN (1818-1887)

Vincent in the Cape Verde Islands . A few essexites have been found in See also:

• BRITAIN (Gr. Hperavuml vi7vot, Bperravia; Lat. Britannia, rarely Britannia)

Britain, accompanying the Carboniferous teschenites near Edinburgh and in the Campsie Hills of See also:

• STIRLINGSHIRE

Stirlingshire . As they contain both orthoclase and plagioclase felspar they have a certain See also:

• AFFINITY (Lat. affinitas, relationship by marriage, from offinis, bordering on, related to; finis, border, boundary)
• AFFINITY, CHEMICAL

affinity to the olivine-monzonites and kentallenites .

The shonkinites are dark See also:

• GREY, CHARLES GREY, 2ND EARL (1764-1845)
• GREY, HENRY GREY, 3RD EARL (1802-1894)
• GREY, LADY JANE (1537-1554)
• GREY, SIR EDWARD
• GREY, SIR GEORGE (1812–1898)

grey rocks consisting of olivine, green augite, dark brown biotite, nepheline and orthoclase, which are found at Shonkin Sag in the Highwood Mountains of Montana . They are basic See also:

• VARIATIONS
• VARIATIONS, CALCULUS
• VARIATIONS, CALCULUS OF

variations of sodahte-See also:

• SYENITE

syenite and have some resemblance to theralites, especially in the association of nepheline with large amounts of augite and olivine . They are of exceedingly rare occurrence . (J . S .