Nature's Art Volcanic Rock, Hawaii
by Venetia Featherstone-Witty
Title
Nature's Art Volcanic Rock, Hawaii
Artist
Venetia Featherstone-Witty
Medium
Photograph - Photographs
Description
Most volcanic rocks share a number of common minerals. Differentiation of volcanic rocks tends to increase the silica (SiO2) content mainly by fractional crystallization. Thus, more evolved volcanic rocks tend to be richer in minerals with a higher amount if silica such as phyllo and tectosilicates including the feldspars, quartz polymorphs and muscovite. While still dominated by silicates, more primitive volcanic rocks have mineral assemblages with less silica, such as olivine and the pyroxenes. Bowen's reaction series correctly predicts the order of formation of the most common minerals in volcanic rocks.
Occasionally, a magma may pick up crystals that crystallized from another magma; these crystals are called xenocrysts. Diamonds found in kimberlites are rare but well-known xenocrysts; the kimberlites do not create the diamonds, but pick them up and transport them to the surface of the Earth.
FEATURED 8/5/18 in "Pretty in Pink, Blue or Purple"
FEATURED 8/5/18 in "Macro Marvels"
FEATURED 8/5/18 in "Images That Excite You"
FEATURED 8/5/18 in "Abstract Moods"
FEATURED 8/7/18 in "First Friday Gallery"
FEATURED 8/9/18 in "Pin Me Daily"
FEATURED 8/9/18 in "Lady Photographers"
FEATURED 8/13/18 in "Out of the Ordinary"
FEATURED 8/24/18 in "Macro Photography Only"
FEATURED 3/14/19 in "The World We See"
Uploaded
July 30th, 2018
Embed
Share
Comments (13)
Lyric Lucas
Congratulations, your creative and unique art work is Featured in the "Out Of The Ordinary 1 A Day" group! l/f