Bogheadn.

/ˈbɒɡhɛd/

Forms: Also boghead.

Etymology: < Boghead, the name of an estate near Bathgate in West Lothian.

Applied attributively to a deep brown shale found in Boghead. See torbanite n.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > shale > others

till1672

bass1686

bat1686

blue metal1699

scallop slate1711

black shale1730

shale-shiver1794

shale1825

till-stonec1830

Wenlock shale1834

famp1836

Boghead1858

oil shale1866

paper shale1874

symon1881

paste-rock1882

slasto1953

1858 Greg & Lettsom Man. Mineral. 16 Torbanite... Boghead mineral. Boghead coal.

1867 W. W. Smyth Treat. Coal & Coal-mining 18 It is by no means easy..to draw a distinct line of demarcation between cannel and the black basses, bats, or crisp shales, which occur in the coal measures... And between all these and the torbanite, or ‘Boghead mineral’, there exists a relationship which makes the difference only one of degree.

1919 Chambers's Jrnl. June 390/2 The famous oil-shale of Torbanehill, torbanite or bog-head cannel, is often regarded as a variety of cannel coal.

1937 Nature 20 Feb. 340/1 Boghead coal is a comparatively rare and valuable material yielding gas and paraffin on distillation.

1960 Gloss. Coal Terms (B.S.I.) 6 Boghead coal, Torbanite, coal resembling cannel coal in physical appearance and properties, but distinguished microscopically by the presence of the remains of algae.

This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).

单词	boghead
释义	Bogheadn. /ˈbɒɡhɛd/ Forms: Also boghead. Etymology: < Boghead, the name of an estate near Bathgate in West Lothian. Applied attributively to a deep brown shale found in Boghead. See torbanite n. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > shale > others till1672 bass1686 bat1686 blue metal1699 scallop slate1711 black shale1730 shale-shiver1794 shale1825 till-stonec1830 Wenlock shale1834 famp1836 Boghead1858 oil shale1866 paper shale1874 symon1881 paste-rock1882 slasto1953 1858 Greg & Lettsom Man. Mineral. 16 Torbanite... Boghead mineral. Boghead coal. 1867 W. W. Smyth Treat. Coal & Coal-mining 18 It is by no means easy..to draw a distinct line of demarcation between cannel and the black basses, bats, or crisp shales, which occur in the coal measures... And between all these and the torbanite, or ‘Boghead mineral’, there exists a relationship which makes the difference only one of degree. 1919 Chambers's Jrnl. June 390/2 The famous oil-shale of Torbanehill, torbanite or bog-head cannel, is often regarded as a variety of cannel coal. 1937 Nature 20 Feb. 340/1 Boghead coal is a comparatively rare and valuable material yielding gas and paraffin on distillation. 1960 Gloss. Coal Terms (B.S.I.) 6 Boghead coal, Torbanite, coal resembling cannel coal in physical appearance and properties, but distinguished microscopically by the presence of the remains of algae. This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018). < n.1858
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