Sentences with phrase «formed over eons»

At any rate, when «normal» rain containing natural carbonic acid falls upon silicon - containing sedimentary rocks formed over eons from the shells of tiny marine creatures — radiolarians, diatoms and some sponges — this «siliceous» rock combines with the carbonic acid to form ions of bicarbonate.

Not exact matches

This cycle repeats itself over eons to form a flat terrain of finely layered sediments.

Pore spaces that shelter subsurface microbes areconstricted to the vanishing point in metamorphic rocks buried over eons byfurther sedimentation, volcanic eruptions, or massive folding of Earth's crust.And dense crystalline material formed by melting — basic igneous rock — offerslittle housing or dining.

Stravinsky's «Rites of Spring» Certain passages in this piece occasionally cause me to have involuntary visualizations of primitive life forms evolving over the eons.