Fire slate

As fire shale in are mining coal containing layers designated, the clay mineral content is greater than 30%. These are shale clays mixed with thin layers of coal . The coal and the shale can also appear in alternating layers. Fire slate has a high ash content of over 35 to 65%.

etymology

The origin of the word is uncertain, Adelung refers to the fact that Brand can presumably also mean "... the lowest or most extreme of a thing ...". The obvious explanation “combustible slate” could thus possibly be a folk etymology .

literature

Otto Lueger: Brandschiefer . In: Lexicon of all technology and its auxiliary sciences . tape 2 . Stuttgart, Leipzig 1905, p. 247 ( online [accessed February 25, 2015]).

Web links

Fire slate . In: Heinrich August Pierer , Julius Löbe (Hrsg.): Universal Lexicon of the Present and the Past . 4th edition. tape 3 . Altenburg 1857, p. 203 ( zeno.org ).
Fire slate . In: Meyers . 6th edition. Volume 3, p. 322 .
Brandschiefer - Lexicon of Geosciences

Individual evidence

↑ G. Leithold et al .: Taschenbuch Bergbau . Civil engineering. Ed .: Chamber of Technology, Association of Mining. tape III . German publishing house for basic industry, Leipzig 1962, p. 18 .
^ Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining dictionary .
↑ The Doberlug-Kirchhain anthracite deposit. (PDF; 1.23 MB) In: Deep-lying deposits. State Office for Mining, Geology and Raw Materials (LBGR) Brandenburg, July 18, 2007, p. 6 , accessed on July 29, 2010 .
^ Johann Christoph Adelung: The fire . In: Grammatical-Critical Dictionary of High German Dialect . tape 1 . Leipzig 1793, p. 1150 ( Online [accessed June 5, 2019]).

[1] G. Leithold et al .: Taschenbuch Bergbau . Civil engineering. Ed .: Chamber of Technology, Association of Mining. tape III . German publishing house for basic industry, Leipzig 1962, p. 18 .

[2] Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining dictionary .

[3] The Doberlug-Kirchhain anthracite deposit. (PDF; 1.23 MB) In: Deep-lying deposits. State Office for Mining, Geology and Raw Materials (LBGR) Brandenburg, July 18, 2007, p. 6 , accessed on July 29, 2010 .

[4] Johann Christoph Adelung: The fire . In: Grammatical-Critical Dictionary of High German Dialect . tape 1 . Leipzig 1793, p. 1150 ( Online [accessed June 5, 2019]).