geochemistry
51Richard L. Hay — Richard LeRoy Hay (April 29 1929 ndash; February 10 2006) was an American geologist whose most famous work was as the principal geologist working with Mary Leakey at Olduvai Gorge, the site of many important hominid finds in the study of human… …
52Samuel Epstein (geochemist) — Infobox Scientist name = Samuel Epstein image width = caption = birth date = birth date|1919|12|9 birth place = Kobryn, Belarus residence = nationality = death date = death date and age|2001|9|17|1919|12|9 death place = Pasadena, California,… …
53Harold C. Helgeson — Harold C. (Hal) Helgeson (November 13, 1931 – May 28, 2007) was a professor at the University of California, Berkeley. He was widely regarded as the preeiminent practioner of theoretical geochemistry for more than 40 years, a career he embraced… …
54Outline of science — The following outline is provided as an overview of and topical guide to science: Science – in the broadest sense refers to any system of objective knowledge. In a more restricted sense, science refers to a system of acquiring knowledge based on… …
55Moon — This article is about Earth s Moon. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation) …
56Ordovician — Period 488.3–443.7 million years ago …
57Petroleum — For other uses, see Petroleum (disambiguation). Proven world oil reserves, 2009 …
59Snowball Earth — The Snowball Earth hypothesis as it was originally proposedcite book author = Kirschvink, J.L. year = 1992 chapter = Late Proterozoic low latitude global glaciation: The snowball Earth title = The Proterozoic Biosphere: A Multidisciplinary Study… …
60Vladimir Vernadsky — Infobox Scientist name = Vladimir Ivanovich Vernadsky image width = 148px caption = birth date = March 12, 1863 birth place = Saint Petersburg, Russia death date = January 6, 1945 death place = Moscow, Soviet Union residence = Russian Empire… …
