Valdar Jaanusson (1923–1999) was an Estonian-Swedish geologist. In 1960 he introduced the concept of

topostratigraphy Topostratigraphy ( sv, topostratigrafi) is a method of establishing stratigraphical units based on a mix of biostratigraphy and lithostratigraphy. It is used locally in the Baltic region to study the Ordovician-aged sedimentary rock. In topostratgra ...

into Swedish

stratigraphy Stratigraphy is a branch of geology concerned with the study of rock (geology), rock layers (Stratum, strata) and layering (stratification). It is primarily used in the study of sedimentary rock, sedimentary and layered volcanic rocks. Stratigrap ...

. A recognized expert on the geology of the

Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start ...

period Period may refer to: Common uses * Era, a length or span of time * Full stop (or period), a punctuation mark Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (or rhetorical period), a concept ...

, he was member of the

Estonian Academy of Sciences Founded in 1938, the Estonian Academy of Sciences ( et, Eesti Teaduste Akadeemia) is Estonia's national academy of science in Tallinn. As with other national academies, it is an independent group of well-known scientists whose stated aim is to ...

.Dödsfall: Valdar Jaanusson
Dagens Nyheter.

References

1923 births 1999 deaths Estonian geologists Estonian emigrants to Sweden Estonian paleontologists Estonian World War II refugees Scientists from Tallinn 20th-century Swedish geologists Swedish paleontologists Employees of the Swedish Museum of Natural History Uppsala University alumni Academic staff of Uppsala University {{geologist-stub