Arnold Constantin Peter Franz von Lasaulx (14 June 183925 January 1886) was a German mineralogist and

petrographer Petrography is a branch of petrology that focuses on detailed descriptions of rocks. Someone who studies petrography is called a petrographer. The mineral content and the textural relationships within the rock are described in detail. The class ...

Life

He was born at

Kastellaun Kastellaun is a town in the Rhein-Hunsrück-Kreis (district) in Rhineland-Palatinate, Germany. It is the seat of the like-named ''Verbandsgemeinde'', a kind of collective municipality. Geography Location The town lies in the eastern Hunsrück ...

near

Coblenz Koblenz (; Moselle Franconian: ''Kowelenz''), spelled Coblenz before 1926, is a German city on the banks of the Rhine and the Moselle, a multi-nation tributary. Koblenz was established as a Roman military post by Drusus around 8 B.C. Its name ...

, and educated at the

University of Berlin Humboldt-Universität zu Berlin (german: Humboldt-Universität zu Berlin, abbreviated HU Berlin) is a German public research university in the central borough of Mitte in Berlin. It was established by Frederick William III on the initiative o ...

, where he took his Ph.D. in 1868. In 1875, he became an associate professor of mineralogy at Breslau, and in 1880, a professor of mineralogy and

geology Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Ear ...

Bonn The federal city of Bonn ( lat, Bonna) is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of over 300,000. About south-southeast of Cologne, Bonn is in the southernmost part of the Rhine-Ruhr r ...

. He was distinguished for his researches on

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. ( ...

s and on

crystallography Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids. Crystallography is a fundamental subject in the fields of materials science and solid-state physics (condensed matter physics). The wor ...

, and he was one of the earlier workers on microscopic petrography. He described in 1878 the eruptive rocks of the district of

Saar Saar or SAAR has several meanings: People Given name *Saar Boubacar (born 1951), Senegalese professional football player * Saar Ganor, Israeli archaeologist *Saar Klein (born 1967), American film editor Surname * Ain Saar (born 1968), Est ...

and

Moselle The Moselle ( , ; german: Mosel ; lb, Musel ) is a river that rises in the Vosges mountains and flows through north-eastern France and Luxembourg to western Germany. It is a bank (geography), left bank tributary of the Rhine, which it jo ...

. In 1880 he edited "''Der Aetna''" from the manuscripts of

Wolfgang Sartorius von Waltershausen Wolfgang Sartorius Freiherr von Waltershausen (17 December 180916 March 1876) was a German geologist. Life and work Waltershausen was born at Göttingen and educated at this city's university. There he devoted his attention to physical and natur ...

, the results of observation made between the years 1834 and 1869. He was author of "''Elemente der Petrographie''" (1875), "''Einführung in die Gesteinslehre''" (1885), and "''Précis de petrographie''" (1887). He died at Bonn in January 1886.

Works

*'' Petrographische Studien an den vulkanischen Gesteinen der Auvergne'' (Stuttgart 1868–71); Petrographic studies on the volcanic rocks of the

Auvergne Auvergne (; ; oc, label=Occitan, Auvèrnhe or ) is a former administrative region in central France, comprising the four departments of Allier, Puy-de-Dôme, Cantal and Haute-Loire. Since 1 January 2016, it has been part of the new region Auverg ...

. *'' Das Erdbeben von Herzogenrath vom 22. Okt. 1873'' (Bonn 1874); The earthquake of Herzogenrath on 22 October 1873. *'' Das Erdbeben von Herzogenrath vom 24. Juni 1877'' (Bonn 1878); The earthquake of Herzogenrath on 24 June 1877.The Founders of Seismology
by Charles Davison *'' Elemente der Petrographie'' (Bonn 1875); Elements of petrography. *'' Über vulkanische Kraft'' (n. d. Engl. of Robert Mallet, das. 1875); *'' Aus Irland, Reiseskizzen und Studien'' (Bonn 1877); *'' Sizilien. Ein geographisches Charakterbild'' (Bonn 1879); *'' Der Ätna'', according to

's manuscripts, edited and completed, (Leipzig 1880); *'' Die Bausteine des Kölner Doms'' (Bonn 1882); *'' Einführung in die Gesteinslehre'' (Berl. 1886); *'' Irland und Sizilien'' (Berlin 1883) *'' Wie das Siebengebirge entstand'' (1884).

References

Attribution: * {{DEFAULTSORT:Lasaulx, Arnold von German mineralogists German volcanologists Crystallographers Academic staff of the University of Breslau Academic staff of the University of Bonn Humboldt University of Berlin alumni People from Rhein-Hunsrück-Kreis 1839 births 1886 deaths