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rises to the surface the pressure on it decreases. When this happens gasses dissolved in the magma are able to come out of solution, forming gas bubbles (the cavities) inside it. When the magma finally reaches the surface as lava and cools, the rock solidifies around the gas bubbles and traps them
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texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside. This texture is common in
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118:(American usage) or amygdales (British usage). Sometimes these can be sources of semi-precious or precious stones such as diamonds.
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D. Armstrong, F. Mugglestone, R. Richards and F. Stratton "OCR AS and A2 Geology". Pearson
Education Limited, 2008, p. 76.
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inside, preserving them as holes filled with gas called vesicles.
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that have come to the surface of the Earth, a process known as
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Texture of small enclosed cavities found in some volcanic rocks
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Rock types that display a vesicular texture include
159:"Elmhurst College Powerpoint via google viewer"
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114:. Individual cavity fillings are termed
34:Vesicular texture in volcanic rock from
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90:in which the volcanic rock, usually
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164:October 30, 2012, at the
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187:Vesicules and Amygdule
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86:A related texture is
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139:Glossary of geology
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257:Categories
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112:chalcedony
45:Vesicular
116:amygdules
76:extrusion
68:aphanitic
162:Archived
133:See also
100:zeolites
96:andesite
61:volcanic
51:La Palma
36:Tenerife
104:calcite
47:olivine
127:scoria
123:pumice
108:quartz
92:basalt
208:This
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