Jack Sepkoski

-

Jack John Sepkoski (born 26 July 1948 in Presque Isle, Maine, May 1, 1999) is an American geologist and paleontologist, pioneer of mass extinction studies, co-author of the thesis on the occurrence of regular (every 26.2 million years) cycle Mass extinctions in the Mesozoic and Cenozoic.

He graduated from Notre Dame University, a doctorate in 1977 from Harvard University on the basis of his work on the geological and paleontology of the Black Hills. From 1974 to 1978 he was a lecturer at the University of Rochester. He then became a lecturer at the University of Chicago, where he worked for a pension and where he was appointed professor in 1986. At the same time he worked at the Chicago Natural History Museum. In 1983 he was awarded the Charles Schuchert Award, Paleontological Society.

One of Sepkoski's major research themes was the course and causes of the great extinctions in the fanzoon. Based on independent research, and with Raup, he documented the existence of five major major extinctions and calculated the percentage of extinct taxa. They also found the cyclical nature of great and minor extinctions in the Mesozoic and the kenosis. Selected publications Bibliography Authoritative control (person):

wiki

Comments

Post a Comment

Popular posts from this blog

Association of Jewish handicrafts "Jad Charuzim"

-
The Jewish Handgun Association "Jad Charuzim" - a Jewish craft organization, operating in Galicia since 1875. She was the founder of many synagogues (eg Yad Charuzim Synagogue in Sanok, Jad Charuzim Synagogue in Yaroslav, Zasany Synagogue in Przemysl), burs, self-help and charity activities, libraries, readings and readings. In 1927, in order to enable its members to use small loans, the association established its own credit cooperative "Cooperative Bank of Cooperatives". The Association's activities ceased during World War II. wiki
Read more

Grouping Red Arrows

-
Raggruppamento Frecce Rosse (Red Arrow Group) - Collaborative armed formation of an Italian army composed of Indians, Arabs and Africans during the Second World War. From May to July 1942, an armed formation was formed under the name Raggruppamento Centri Militari, consisting mainly of British Army prisoners of war originating in Arab countries, India and northern and eastern Africa. They were Hindus, Arabs, Sudanese, Tunisians. The officers and the non-commissioned officers were Italian. The formation consisted of three subdivisions: It was about 1.2 thousand. including about 400 Hindus and about 200 Arabs. Colonel Massimo Invrea de Stato headed it. Subsequently, a small number of Tunisians and Indians were sent to Italy to complete their parachute training in Tarquinia. In August 1942, the formation was renamed Raggruppamento Frecce Rosse. After the defeat of the German-Italian forces at El Alamein at the turn of October and November 1942, the Indians and Arabs lost motivation t...
Read more

Catechism of Polish Child

-
Catechism of the Polish Child - one of the patriotic poets Wladyslaw Belzy published in the volume of the Polish Children's Catechism in 1900. The poem is also known under the title "Confession of the Polish Child" or "Catechism of a Young Pole". It starts with the words "Who are you? "Little Pole". His simple form, referring to children's calculations, made him the simplest form of patriotic education of the youngest generation. The work consists of basic questions and answers about the identity features of a young Pole. It made it easier to memorize national characters and symbols. This work was covered in 1951 by censorship in Poland, subject to immediate withdrawal from libraries. wiki
Read more