Abundances of the elements (data page)

The figures estimate average concentrations of chemical elements in the soils of more than 300 cities and settlements in Europe, Asia, Africa, Australia, and America.

[1] Regardless of significant differences between abundances of several elements in urban soils and those values calculated for the Earth's crust, the element abundances in urban soils generally reflect those in the Earth's crust.

(The average density of sea water in the surface is 1.025 kg/L) Atom mole fraction relative to silicon = 1.

Underlined zeroes indicate figures of indeterminable significance that were present in the source notation.

Newsom, Horton E. (1995), "Composition of the Solar System, Planets, Meteorites, and Major Terrestrial Reservoirs", in Ahrens, Thomas J.