Chemijos terminų aiškinamasis žodynas – 2-asis patais. ir papild. leid. – Vilnius: Mokslo ir enciklopedijų leidybos institutas. Kazys Daukšas, Jurgis Barkauskas, Vitas Daukšas. 2003.
geochemical cycle — Developmental path followed by individual elements or groups of elements in the crustal and subcrustal zones of the Earth and on its surface. The concept encompasses geochemical differentiation (natural separation and concentration of elements)… … Universalium
Early Cambrian geochemical fluctuations — The start of the Cambrian period is marked by fluctuations in a number of geochemical records, including Strontium, Sulfur and Carbon isotopic excursions. While these anomolies are difficult to interpret, a number of possibilities have been put… … Wikipedia
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… … Universalium
sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… … Universalium
hydrosphere — /huy dreuh sfear /, n. the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere. [1885 90; HYDRO 1 + SPHERE] * * * Discontinuous layer of water at or near the Earth s surface. It… … Universalium
Evolutionary history of life — Although evidence of early life is scarce and often difficult to interpret, it appears that life appeared on Earth relatively soon (on the geologic time scale) after the planet had cooled enough for liquid water to be present. The dominant theory … Wikipedia
Harold 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… … Wikipedia
Carbon dioxide in the Earth's atmosphere — Carbon dioxide forms approximately 0.04% of the Earth s atmosphere. It is essential to photosynthesis in plants and other photoautotrophs, and is also a prominent greenhouse gas due to its radiative forcing strength.ConcentrationAs of November… … Wikipedia
