phonolite
Concise Oxford English Dictionary © 2008 Oxford University Press:
phonolite /ˈfəʊnəlʌɪt/
▶noun Geology a fine-grained volcanic rock composed of alkali feldspars and nepheline.
'phonolite' also found in these Oxford entries:
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phonoliteConcise Oxford English Dictionary © 2008 Oxford University Press: phonolite /ˈfəʊnəlʌɪt/ ▶noun Geology a fine-grained volcanic rock composed of alkali feldspars and nepheline. 'phonolite' also found in these Oxford entries:
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