Theodor Otto Gustav Johannes Weigelt (24 July 1890 in Reppen, 22 April 1948 in Klein-Gerau) was a German paleontological, geologist. [1] After studying at the Martin Luther University Halle-Wittenberg, he habilitated in December 1918 and initially worked as a collections assistant at Halle before he began an academic career at the same university. In 1924, he was commissioned to study the geology of seismic events along the Texas Gulf Coast and discovered that salt domes were important in oil drilling. Weigelt's study of fossil specimens on the gulf coast, led him to become the first proponent of taphonomy, the study of how organisms decay and eventually become fossilised. [2] In 1926, he became a lecturer at University of Greifswald. A year later he published "Recent Vertebrate Corpses and Their Palaeobiological Significance" that cemented his reputation as the founder of biostratinomy the process that occurs after an organism dies but before its final buriel. The work led to a promotion as full professor. In 1929, he moved back to Halle to take the position of professor of geology, succeeding his former scientific mentor Johannes Walther. In Halle, he made an extensive study of vertebrate fossils in the Kupferschiefer area and collected many thousands of specimens. In 1933, he became a Nazi. In 1934, he founded the Museum for Earth Science of Central Germany at Martin Luther University Halle-Wittenberg. [3] [4] After the war, he was denazified, fined and was no longer allowed to work.
After finishing high school, which he spent in Halle and Blankenburg in 1909, [5] Weigelt studied natural sciences and prehistory at the Martin Luther University Halle-Wittenberg. Due to the death of his father and his mothers illness, Weigelt was forced to become financially independent. [4] His first job between 1911 and 1912, was to assist Otto Schlüter at the geographical department at the university, working at the same time as his study. [5] In 1913, he was an assistant to Johannes Walther at the Institute of Geography. [6] Just one year later, in 1914, he wrote a geological-archaeological thesis on the stratigraphic work on the Upper Harz Kulm, [4] but was only awarded his doctorate in December 1917 due to the outbreak of the World War I and his voluntary participation in it. [6] In the thesis, Weigelt examined the variability of bivalve species Posidonomya becheri, in the process finding many special cases of the species, in the fossil sedimentation that resulted in insights into sediment petrography. [4] Through the research, he was able to identify an iron ore deposit in Salzgitter. He had through understanding of the structure of the deposit, that was confirmed by drilling. [4]
In 1915, Weigelt was severely wounded in the war by shrapnel in and spent the next two and half years in hospital. [6] Just one year after his doctorate, Weigelt habilitated in December 1918, with a geological-palaeontological thesis. [5] In December 1918. he found work as collection assistant at the Geological Institute of the University of Halle. [6]
In 1924, he was promoted to associate professor. [7] During the year, he received a commission to monitor seismic events on the Texas Gulf Coast. [4] An examination of subsoil bulges led to the discovery of salt domes that was confirmed by drilling and led to investigations into salt tectonics and their importance to oil drilling. [4] Through research in Texas, he was able to describe the importance of salt domes to the Northern Germany oil deposits. [4]
In 1926, Weigelt received a lectureship at the University of Greifswald. In 1927, he formalised his research taken during his time in Texas to publish "Recent Vertebrate Corpses and Their Palaeobiological Significance" that cemented his reputation as the founder of Biostratinomy. [4] The book examines the causes of mass extinctions, the way animals die and how it effects fossilisation with a particular examination of the fossil record at Smithers Lake. [4] In 1927, in the Gulf coastal plains, he was able to excavate and examine a large number of fossils which he collected. [4] In 1928, Weigelt completed his commission in Texas he returned to Germany and was promoted to full professor of geology and palaeontology, [7] succeeding Otto Jaekel. [4] A year later in 1929, Weigelt became full professor of geology and palaeontology at the University of Halle, succeeding his former scientific mentor Johannes Walther. [4] Over many years, he conducted research into the tectonic and stratigraphic diversity of the mountain areas around Halle and in particular the Kupferschiefer, i.e. copper slate deposits that are common in Halle, of which many samples were sent to the collection at the Museum of Central German Earth History. [4] In 1930, he examined the fossil of a reptile, Weigeltisaurus , whose original scientificic name was Palaeochamaeleo jaekeli but later renamed to Weigeltisaurus jaekeli. The reptile had originally been found by a fossil hunter and purchased by Otto Jaekel and it led Weigelt to conduct an osteological study of the specimen. However, his main interest was a biostratonomic study in the context of the location and preservation of ganoid fish fossils. [4] Weigelt also studied plant fossils in the Kupferschiefer area, that lead to a large paleobiological study of many species of plants. His most important study that period was the discovery and excavation of fossil vertebrates in the lignite coal deposits of the Kupferschiefer. [4] The existence of vertebrate fossils in the area had been known about since 1908 and had been first excavated by Walther in 1926. Weigelt understood from the first that these excavations would become his life's work. [4] During this period, he was fundamentally interested in biostratonomic problems.
Throughout this period Weigelt collected a huge number of plant, animal and other types of paleobiological specimens. These were initially stored in an old church, then a Bishops manse. By 1934, the quality and quantity of specimens eventually became sufficient to found the geologically paleontological Geiseltalmuseum in Halle. [8] The collection comprises around 50,000 fossils and is part of the central repository of natural science collections at Martin Luther University.
In 1933, he joined the Nazis (membership number 2,255,659), became a member of the Sturmabteilung and also became a member of the National Socialist Teachers League in 1934. [1] He became vice president of the Leopoldina in 1932 and was regarded as the Nazi party's supervisor. [9]
From November 1936 to January 1945, he was rector of the University of Halle and promoted its reorganization in line with armaments policy and Nazi ideology. He also worked as an advisor to the four-year plan authority and developed ore deposits for the industrial conglomerate Reichswerke Hermann Göring in Salzgitter. [1] From 1939, he was also one of the editors of the journal "Der Biologe" (The Biologist), which had been taken over by the SS Ahnenerbe. [1]
At the end of the World War II, he was denazified in Hesse with a fine, but was no longer employed.
In 1936, Weigelt became a corresponding member of the Saxon Academy of Sciences in Leipzig. This was followed by corresponding membership of the Prussian Academy of Sciences in Berlin in 1941. [4]
He was also a member and chairman of the Natural Science Association for Saxony and Thuringia in Halle and became honorary member in 1936. He was president of the German Paleontological Society from 1936 to 1938, honourary president of the German National Academy of Sciences Leopoldina in 1938 and chairman of the Thuringian Geological Association in 1941 [4] where he succeeded German mineralogist Gottlob Linck.
In 1932, Weigelt was appointed to the position of Vice President of the German National Academy of Sciences Leopoldina, a position he held until 1942. [1] In 1934, the Leopoldina honoured him with the Cothenius Medal for particularly important scientific work [5] in relation to his work in the Geisel Valley. [4] Weigelt was awarded several high medals of the National Socialist regime and was appointed Gaudozentenführer (local leader of a faculty) in 1945.
Oskar Kuhn was a German palaeontologist.
Otto Ferdinand Georg Kern was a German classical philologist, archaeologist and epigraphist. He specialized in the field of ancient Greek religion, being known for his investigations of Greek mystery cults and Orphism, as well as the ancient city of Magnesia on the Maeander and later also the history of ancient studies. In 1907 he became professor at the University of Halle-Wittenberg, where he became rector in 1915/16.
Protorosaurus is an extinct genus of reptile. Members of the genus lived during the late Permian period in what is now Germany and Great Britain. Once believed to have been an ancestor to lizards, Protorosaurus is now known to be one of the oldest and most primitive members of Archosauromorpha, the group that would eventually lead to archosaurs such as crocodilians and dinosaurs.
Coelurosauravus is an extinct genus of gliding reptile, known from the Late Permian of Madagascar. Like other members of the family Weigeltisauridae, members of this genus possessed long, rod-like ossifications projecting outwards from the body. These bony rods were not extensions of the ribs but were instead a feature unique to weigeltisaurids. It is believed that during life, these structures formed folding wings used for gliding flight, similar to living gliding Draco lizards.
Avicephala is a potentially polyphyletic grouping of extinct diapsid reptiles that lived during the Late Permian and Triassic periods characterised by superficially bird-like skulls and arboreal lifestyles. As a clade, Avicephala is defined as including the gliding weigeltisaurids and the arboreal drepanosaurs to the exclusion of other major diapsid groups. This relationship is not recovered in the majority of phylogenetic analyses of early diapsids and so Avicephala is typically regarded as an artificial or unnatural grouping. However, the clade was recovered again in 2021 following a redescription of Weigeltisaurus, raising the possibility that the clade may be valid after all, although subsequent analyses have not supported this result.
Claudiosaurus is an extinct genus of diapsid reptiles from the Late Permian Sakamena Formation of the Morondava Basin, Madagascar. It has been suggested to be semi-aquatic.
Weigeltisaurus is an extinct genus of weigeltisaurid reptile from the Late Permian Kupferschiefer of Germany and Marl Slate of England. It has a single species, originally named as Palaechamaeleo jaekeli in 1930 and later assigned the name Weigeltisaurus jaekeli in 1939, when it was revealed that Palaeochamaeleo was a preoccupied name. A 1987 review by Evans and Haubold later lumped Weigeltisaurus jaekeli under Coelurosauravus as a second species of that genus. A 2015 reassessment of skull morphology study substantiated the validity of Weigeltisaurus and subsequent authors have used this genus. Like other Weigeltisaurids, they possessed long rod-like bones that radiated from the trunk that were likely used to support membranes used for gliding, similar to extant Draco lizards.
Wilhelm Philippe Schimper was an Alsatian botanist with French, later German citizenship. He was born in Dossenheim-sur-Zinsel, but spent his youth in Offwiller, a village at the foot of the Vosges mountain range in Alsace. He was the father of botanist Andreas Franz Wilhelm Schimper (1856–1901), and a cousin to naturalist Karl Friedrich Schimper (1803–1867) and botanist Georg Heinrich Wilhelm Schimper (1804–1878).
Palaeotis is a genus of paleognath birds from the middle Eocene epoch of central Europe. One species is known, Palaeotis weigelti. The holotype specimen is a fossil tarsometatarsus and phalanx. Lambrect (1928) described it as an extinct bustard, and gave it its consequent name. After a suggestion by Storrs L. Olson, a review of the type specimen and the referral of several other fossils by Houde and Haubold (1987) concluded that Palaeotis is a palaeognath and assigned it to the same order as ostriches; the Struthioniformes. In 2021, it was considered a member of the family Paleotididae alongside Galligeranoides from the Early Eocene of France, which were found to be basal members of the Struthioniformes.
Onychodus is a genus of prehistoric lobe-finned fish which lived during the Devonian Period. It is one of the best known of the group of onychodontiform fishes. Scattered fossil teeth of Onychodus were first described from Ohio in 1857 by John Strong Newberry. Other species were found in Australia, England, Norway and Germany showing that it had a widespread range.
The Geisel valley is a valley in Saxony-Anhalt, Germany, situated west of Merseburg, Saalekreis district. It is named after the River Geisel which rises in Mücheln and is a tributary of the Saale, just under 25 km (16 mi) long.
Martin Luther University Halle-Wittenberg, also referred to as MLU, is a public research university in the cities of Halle and Wittenberg. It is the largest and oldest university in the German state of Saxony-Anhalt. MLU offers German and international (English) courses leading to academic degrees such as BA, BSc, MA, MSc, doctoral degrees, and Habilitation.
Karl Wilhelm Georg von Fritsch was a German geologist and paleontologist.
Johannes Walther was a German geologist who discovered important principles of stratigraphy, including Walther's Law.
The Marl Slate Formation is a geological formation in England. Despite its name, it is mostly dolomite rock. The Marl Slate Formation was formed about 273 to 259 million years ago, during the Guadalupian and Lopingian epochs of the late Permian period of the Earth's geological history. This formation is part of the Zechstein Group of rocks, and is equivalent to the Kupferschiefer of Germany. The Marl Slate Formation contains fossils including the conodont Mesogondolella britannica and the dorypterid fishes Dorypterus and Lekanichthys, as well as the gliding reptile Weigeltisaurus and terrestrial reptile Protorosaurus The Marl Slate Formation outcrops in County Durham and Yorkshire in north-east England.
The Kupferschiefer or Kupfermergel, is an extensive and remarkable sedimentary unit in Central Europe. The relatively monotonous succession is typically 30 to 60 centimetres and maximum 2 metres (6.6 ft) thick, but extends over an area of 600,000 square kilometres (230,000 sq mi) across the Southern Permian Basin. The Kupferschiefer can be found in outcrop or in the subsurface straddling six countries, including parts of the southern North Sea. The lateral equivalent outcropping in England is called Marl Slate.
Andor Kertész was a Hungarian mathematician and professor of mathematics at the Lajos Kossuth University (KLTE), Debrecen. He is the father of linguist András Kertész.
Konrad Sasse was a German musicologist and Handel scholar.
Adolf Remane was a German zoologist who pioneered the study of the marine meiofauna. He was a director of the Zoological Institute of Kiel University, and a President of the German Zoological Society.
The Geiseltal fossil deposit is located in the former lignite district of the Geiseltal south of the city of Halle in Saxony-Anhalt, Germany. It is an important site of now extinct plants and animals from the Middle Eocene period 48 to 41 million years ago. There is evidence that coal was first mined in the Geiseltal in 1698, but the first fossils only came to light by chance at the beginning of the 20th century. Scheduled scientific excavations began in 1925 by the Martin Luther University Halle-Wittenberg. Interrupted by World War II, the investigations can be divided into two research phases. Due to the increasing depletion of the raw material deposits, the excavations gradually came to a standstill in the mid-1980s and finally ended at the beginning of the third millennium.