Johannes Herman Frederik Umbgrove H

FRSE Fellowship of the Royal Society of Edinburgh (FRSE) is an award granted to individuals that the Royal Society of Edinburgh, Scotland's national academy of science and letters, judged to be "eminently distinguished in their subject". This soci ...

(5 February 1899

Hulsberg Hulsberg (Limburgish: ''Hölsberg'') is a village in the southeastern Netherlands. It is located in the municipality of Beekdaelen, Limburg, about 15 km east of Maastricht. History The village was first mentioned in 1147 as Huleberga, and ...

(

Limburg Limburg or Limbourg may refer to: Regions * Limburg (Belgium), a province since 1839 in the Flanders region of Belgium * Limburg (Netherlands), a province since 1839 in the south of the Netherlands * Diocese of Limburg, Roman Catholic Diocese in ...

) – 14 June 1954

Wassenaar Wassenaar (; population: in ) is a Municipalities of the Netherlands, municipality and Dorp (town), town located in the Provinces of the Netherlands, province of South Holland, on the western coast of the Netherlands. An affluent suburb of The ...

), called in short Jan Umbgrove, was a Dutch

geologist A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, althou ...

and earth scientist.

Life

Umbgrove studied

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

Leiden University Leiden University (abbreviated as ''LEI''; nl, Universiteit Leiden) is a public research university in Leiden, Netherlands. The university was founded as a Protestant university in 1575 by William, Prince of Orange, as a reward to the city o ...

, he finished his studies in 1926. He then became employed as a

paleontologist Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...

for the (Geological Survey of the

Dutch East Indies The Dutch East Indies, also known as the Netherlands East Indies ( nl, Nederlands(ch)-Indië; ), was a Dutch colony consisting of what is now Indonesia. It was formed from the nationalised trading posts of the Dutch East India Company, whic ...

), where he studied

Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...

foraminifera Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly ...

and

coral Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and se ...

s. He also studied

volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates ...

es,

tectonics Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents k ...

, coastal morphology and the

bathymetry Bathymetry (; ) is the study of underwater depth of ocean floors ('' seabed topography''), lake floors, or river floors. In other words, bathymetry is the underwater equivalent to hypsometry or topography. The first recorded evidence of water ...

of the seas surrounding the

Sunda Islands The Sunda Islands ( id, Kepulauan Sunda) are a archipelago , group of islands in the Malay Archipelago.Chisholm, Hugh, ed. (1911). wikisource:1911_Encyclopædia_Britannica/Sunda_Islands, "Sunda Islands" . ''Encyclopædia Britannica Eleventh Ed ...

. From 1929 he went back to

Leiden Leiden (; in English and archaic Dutch also Leyden) is a city and municipality in the province of South Holland, Netherlands. The municipality of Leiden has a population of 119,713, but the city forms one densely connected agglomeration w ...

to become the assistant of his former teacher B.G. Escher. In 1930 he became professor in

stratigraphy Stratigraphy is a branch of geology concerned with the study of rock layers ( strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithost ...

and paleontology at

Delft University Delft University of Technology ( nl, Technische Universiteit Delft), also known as TU Delft, is the oldest and largest Dutch public technical university, located in Delft, Netherlands. As of 2022 it is ranked by QS World University Rankings among ...

. His research was again multidisciplinary. He studied the

paleogeography Palaeogeography (or paleogeography) is the study of historical geography, generally physical landscapes. Palaeogeography can also include the study of human or cultural environments. When the focus is specifically on landforms, the term pal ...

of the Dutch East Indies from the data acquired by the gravitational surveys of F.A. Vening Meinesz, the paleontology of corals and

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of Colony (biology), colonies of coral polyp (zoology), polyps held together by calcium carbonate. Most coral reefs are built from stony corals, wh ...

s, tectonics, the geology of the Netherlands and

volcanology Volcanology (also spelled vulcanology) is the study of volcanoes, lava, magma and related geological, geophysical and geochemical phenomena (volcanism). The term ''volcanology'' is derived from the Latin word '' vulcan''. Vulcan was the an ...

. Because of his broad field of interest he was one of the first to think of the Earth as one dynamic system, an idea on which he wrote his book ''the Pulse of the Earth'' in 1942. Another book on paleontology was published in 1943. He became a member of the

Royal Netherlands Academy of Arts and Sciences The Royal Netherlands Academy of Arts and Sciences ( nl, Koninklijke Nederlandse Akademie van Wetenschappen, abbreviated: KNAW) is an organization dedicated to the advancement of science and literature in the Netherlands. The academy is housed ...

in 1946. When he became seriously ill in 1952, he continued to write from his bed until his death on 14 June 1954.

Selected publication

References

Sources

*I.M. van der Vlerk & Ph. H. Kuenen, 1954: in Geologie & Mijnbouw, vol. 16, p. 339–346 *A.J. Pannekoek, 1962: ''Geological research at the universities of The Netherlands, 1877-1962'' in Geologie & Mijnbouw, vol. 41 no. 4 p. 161–174 1899 births 1954 deaths Delft University of Technology faculty 20th-century Dutch geologists Leiden University alumni Members of the Royal Netherlands Academy of Arts and Sciences People from Hulsberg {{Geologist-stub