Since the Earth was almost completely covered with ice, carbon dioxide could not be withdrawn from the atmosphere by release of alkaline metal ions weathering out of siliceous rocks.
From the en.wikipedia.org
In late 1938 they found evidence of isotopes of an alkaline earth metal in their sample.
From the en.wikipedia.org
Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust.
From the en.wikipedia.org
As with magnesium salts and other alkaline earth metal salts, calcium salts are often quite soluble in water.
From the en.wikipedia.org
Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in color.
From the en.wikipedia.org
Copeland and her colleagues looked specifically at isotopes of strontium, an alkaline earth metal with similar properties to calcium.
From the newscientist.com
Finding a group 2 alkaline earth metal was problematic, because it did not logically fit with the other elements found thus far.
From the en.wikipedia.org
The product is suitable for any kind of masonry, but it's too alkaline to use on wood or metal.
From the washingtonpost.com
The alkaline earth metals were precipitated either as sulfates or oxalates, leaving the alkali metal in the solution.