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{{for|the classicist|Johann Gottlieb Lehmann}}
⚫ '''Johann Gottlob Lehmann''' (] ] - ] ]) was a ] ] and ] noted for the development of ].
{{Short description|German and Russian mineralogist (1719–1767)}}
{{Infobox scientist
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|caption = Lehmann in the age of 42
|birth_date = {{birth date text|4 August 1719}}
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|death_date = {{death-date and age|22 January 1767|4 August 1719}}
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⚫ '''Johann Gottlob Lehmann''' (4 August 1719{{snd}}22 January 1767) was a German ] and ] noted for his work and research contributions to the ] leading to the development of ].
⚫ He attended the ], from which he received an M.D. in 1741, and then established a practice in ]. Living in ], he developed an interest in the local ] industry, and published on the chemical composition of ore deposits. In ] the ] commissioned him to study mining practices throughout ].


== Life and career ==
⚫ In ] the ] invited him to ], where he became professor of chemistry.
], ]]]


Lehmann was born in ], ] and attended the ], from which he received an M.D. in 1741, and then established a practice in ].{{sfn|Chisholm|1911}}
{{bio-stub}}
⚫ Living in ], he developed an interest in the local ] industry, and published on the chemical composition of ore deposits. In 1750, the ] commissioned him to study mining practices throughout ].


⚫ In 1761, the Russian ] invited him to ], where he became professor of chemistry and director of the imperial museum there.{{sfn|Chisholm|1911}}
⚫ ]
At the ] in the ] he discovered a ] with a reddish-orange mineral ({{chem2|link=lead(II) chromate|PbCrO4}}), which he named "Rotbleierz" (red lead ore); today in English its name is ].<ref>{{cite book | title =De Nova Minerae Plumbi Specie Crystallina Rubra | author = Iohannis Gottlob Lehmanni | year = 1766 | url = http://www.mdz-nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:bvb:12-bsb10226162-6 }}</ref><!--<ref name="Adelung1770">{{cite book|author=Johann Christoph Adelung|title=Mineralogische Belustigungen, zum Behuf der Chymie und Naturgeschichte des Mineralreichs: Mit Kupfern. Fünfter Band|url=https://books.google.com/books?id=AP5cAAAAcAAJ&pg=PA124|year=1770|publisher=bey Joh. Friedrich Heineck und Faber, Buchhändler in Copenhagen|pages=124–}}</ref>-->
]

⚫ ]
Lehmann, ], and ] were founders of stratigraphy.
⚫ ]
{{blockquote|The chief merit of Lehmann is his accurate description of the stratified rocks (''Flötzgebirge''). He distinguished thirty successive bands of rock in the stratified system of Ilfeld and Mansfeld, and set forth the geological structure of that district in an accompanying series of diagrams and sections.
Many of the terms in his description of the Thuringian deposits were adopted by him from the miners, and have been retained in geological literature; for example, ''Zechstein'' or mine-stone, corresponding to the ] and shales or Upper ] group in England; and ''rothes Todtliegendes'' (''Rothliegende'') or red underlayer, the unproductive basement beds below the ore-bearing, and the equivalent of the Lower Dyassic.<ref>{{cite book|author=von Zittel, Karl Alfred|author2=trans. Ogilvie-Gordon, Maria M.|title=History of geology and palæontology to the end of the nineteenth century |year=1901|page= |location=London|publisher=Walter Scott|url=https://archive.org/details/bub_gb_JYZVFnApPgoC}}</ref>}} Lehmann died in Saint Petersburg from injuries caused by the explosion of a ] filled with ].

== Selected works ==
]

* '''' Berlin 1753
* '''' Berlin 1756 ()
* '' '' Berlin 1757
* ''Kurzer Entwurf einer Mineralogie...'' Berlin 1758
* '' '' Berlin 1760

== References ==
{{reflist}}
'''Attribution:'''
* {{Cite EB1911|wstitle=Lehmann, Johann Gottlob|volume=16|page=384}}

== External links ==
{{Commons|Johann Gottlob Lehmann}}
* (1756) - digital facsimile from ]
* (1791) - digital facsimile from ]

{{Authority control}}

{{DEFAULTSORT:Lehmann, Johann Gottlieb}}
⚫ ]
⚫ ]
]
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⚫ ]
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Latest revision as of 19:00, 14 December 2024

For the classicist, see Johann Gottlieb Lehmann. German and Russian mineralogist (1719–1767)
Johann Gottlob Lehmann
Lehmann in the age of 42
Born4 August 1719 (1719-08-04)
Langenhennersdorf, Electorate of Saxony
Died22 January 1767 (1767-01-23) (aged 47)
Saint Petersburg, Russian Empire
NationalityGerman
Alma materUniversity of Wittenberg
Known forStratigraphy
Scientific career
FieldsMineralogy

Johann Gottlob Lehmann (4 August 1719 – 22 January 1767) was a German mineralogist and geologist noted for his work and research contributions to the geologic record leading to the development of stratigraphy.

Life and career

Memorial plaque of Johann Gottlob Lehmann on his birthplace in Langenhennersdorf in Saxony, Germany

Lehmann was born in Langenhennersdorf, Electorate of Saxony and attended the University of Wittenberg, from which he received an M.D. in 1741, and then established a practice in Dresden. Living in Saxony, he developed an interest in the local mining industry, and published on the chemical composition of ore deposits. In 1750, the Royal Prussian Academy of Sciences commissioned him to study mining practices throughout Prussia.

In 1761, the Russian Imperial Academy of Sciences invited him to Saint Petersburg, where he became professor of chemistry and director of the imperial museum there. At the Beryozovskoye deposit in the Urals he discovered a lead ore with a reddish-orange mineral (PbCrO4), which he named "Rotbleierz" (red lead ore); today in English its name is crocoite.

Lehmann, Georg Christian Füchsel, and Giovanni Arduino were founders of stratigraphy.

The chief merit of Lehmann is his accurate description of the stratified rocks (Flötzgebirge). He distinguished thirty successive bands of rock in the stratified system of Ilfeld and Mansfeld, and set forth the geological structure of that district in an accompanying series of diagrams and sections. Many of the terms in his description of the Thuringian deposits were adopted by him from the miners, and have been retained in geological literature; for example, Zechstein or mine-stone, corresponding to the Magnesian Limestone and shales or Upper Dyassic group in England; and rothes Todtliegendes (Rothliegende) or red underlayer, the unproductive basement beds below the ore-bearing, and the equivalent of the Lower Dyassic.

Lehmann died in Saint Petersburg from injuries caused by the explosion of a retort filled with arsenic.

Selected works

Geological profile created by Lehmann

References

  1. ^ Chisholm 1911.
  2. Iohannis Gottlob Lehmanni (1766). De Nova Minerae Plumbi Specie Crystallina Rubra.
  3. von Zittel, Karl Alfred; trans. Ogilvie-Gordon, Maria M. (1901). History of geology and palæontology to the end of the nineteenth century. London: Walter Scott. p. 36.

Attribution:

External links

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