Johann Heinrich Christfried Dau (1790–1831) was a

Holstein Holstein (; nds, label=Northern Low Saxon, Holsteen; da, Holsten; Latin and historical en, Holsatia, italic=yes) is the region between the rivers Elbe and Eider. It is the southern half of Schleswig-Holstein, the northernmost state of German ...

Danish Danish may refer to: * Something of, from, or related to the country of Denmark People * A national or citizen of Denmark, also called a "Dane," see Demographics of Denmark * Culture of Denmark * Danish people or Danes, people with a Danish ance ...

geologist and writer, whose identification of peat layers led eventually to a system of classifying and dating post-glacial northern European

paleoclimate Paleoclimatology (British spelling, palaeoclimatology) is the study of climates for which direct measurements were not taken. As instrumental records only span a tiny part of Earth's history, the reconstruction of ancient climate is important to ...

periods, the Blytt–Sernander sequences based on peat stratigraphy. He died at

Altona, Hamburg Altona (), also called Hamburg-Altona, is the westernmost urban borough (''Bezirk'') of the German city state of Hamburg, on the right bank of the Elbe river. From 1640 to 1864, Altona was under the administration of the Danish monarchy. Alto ...

in 1831.

Selected publications

*''Neues Handbuch über Torf, dessen Natur, Entstehung und Wiedererzeugung, Nutzen im Allgemeinen und für den Staat'', Leipzig, 1823. *''Allerunterthänigster Bericht an die Königliche Dänische Rentekammer über die Torfmoore Seelands nach einer im Herbste 1828 deshalb unternommenen Reise''. Copenhagen and Leipzig, 1829. * ''Om Retfærdighed og Frihed og deres nødvendige Samværen, især i politisk Henseende,'' Copenhagen, 1831.

Selected publications

Further reading