Gerard Jakob De Geer

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Gerard Jakob De Geer (born October 2, 1858 in Stockholm , † July 23, 1943 there ) was a Swedish geologist .

Life

Excerpt from a map of De Geers, here Stockholmsåsen

De Geer studied at Uppsala University where he graduated as a candidate in 1879 . From 1882 De Geer worked as an assistant at the Swedish State Geological Institute before he was appointed geologist in 1885. In this role he discovered, among other things, a lime and kaolin deposit on Ivö klack on the southern Swedish island of Ivö .

In 1893 he received an honorary doctorate in Uppsala and became a lecturer in 1897 and finally professor of geology at Stockholm University from 1904 to 1924 . From 1900 to 1905 De Geer was a member of the Second Chamber of the Swedish Reichstag for the Liberala samlingsparti . From 1902 De Geer was a member of the Royal Swedish Academy of Sciences , from 1918 a member of the Royal Physiographical Society in Lund , from 1921 an honorary member of the Kungliga Vitterhets Historie och Antikvitets Academies and from 1922 a member of the Royal Society of Sciences in Uppsala and a corresponding member of the Prussian Academy of the sciences . In 1925 he also became an honorary member of the then Soviet Academy of Sciences

De Geer has also made a name for himself as a cartographer of Svalbard . He organized and accompanied expeditions to the archipelago in 1882, 1896, 1899, 1901, 1908 and 1910.

Together with his second wife Ebba Hult De Geer , whom he married in 1908, he carried out geochronological and palaeoclimatological research to create a global climate history .

The geologist Sten De Geer was Gerard's son from his first marriage.

Act

In 1924 De Geer founded the Geochronological Institute in Stockholm. In the course of his research he founded the varven chronology . With this method (counting the bands or warventon layers) he showed in 1912 that the ice retreat in Scandinavia occurred within 5000 years.

In 1920 he was awarded the Wollaston Medal of the Geological Society of London .

Works (selection)

  • Några ord om bergarterna på Åland och flyttblocken derifrån (1881)
  • Om lagerföljden inom nordöstra Skåne critical information (1881)
  • Om den skandinaviska landisens andra utbredning (1884)
  • Om kaolin och andra vittringsrester inom Kristianstadsområdets kritsystem (1885)
  • Om ett conglomerate inom urberget vid Vestanå i Skåne (1886)
  • Om vindnötta stenar (1886)
  • Om Barnakällegrottan, en ny kritlokal i Skåne (1887)
  • Om isdelarens lay under Scandinavia begge nedisningar (1888)
  • Quaternary Changes of Level in Scandinavia (1891)
  • On Pleistocene Changes of Level in Eastern North America (1892)
  • Description till geologisk jordartskarta över Hallands län (1893)
  • Om strandlines förskjutning vid våra insjöar (1893)
  • Om kvartära nivåförändringar vid Finska viken (1894)
  • Om Scandinavia geografiska utveckling efter istiden (1896)
  • Om rullstensåsarnas bildningssätt (1897)
  • Stockholmstraktens geologi (1897)
  • Om denenkenvartära landhöjningen kring Bottniska viken (1898)
  • Om algonkisk bergveckning inom Fennoskandias randzon (1899)
  • Om det svenskryska gradmätningsnätets framförande över södra och mellersta Spetsbergen (1900)
  • Om östra Spetsbergens glaciation under istiden (1900)
  • Report om den svenska gradmätning expeditions till Spetsbergen sommaren 1901 (1902)
  • Bidrag till istidens kronologi och klimatlära (1905)

literature

Web links

Individual evidence

  1. ^ Members of the previous academies. Gerard Jakob Freiherr de Geer. Berlin-Brandenburg Academy of Sciences , accessed on March 13, 2015 .
  2. ^ Foreign members of the Russian Academy of Sciences since 1724. Gerard Jakob De Geer. Russian Academy of Sciences, accessed August 15, 2015 (Russian).
  3. ↑ Christina L. Hulbe, Weili Wang, Simon Ommanney: Women in glaciology, a historical perspective . In: Journal of Glaciology , Volume 56 (Issue 200). International Glaciological Society 2010. p. 949
personal data
SURNAME De Geer, Gerard Jakob
BRIEF DESCRIPTION Swedish geologist and politician, member of the Riksdag
DATE OF BIRTH October 2, 1858
PLACE OF BIRTH Stockholm
DATE OF DEATH July 23, 1943
Place of death Stockholm