"stable"@en . "Foid-bearing-alkali-feldspar-microsyenite"@en . "Foid-bearing-alkali-feldspar-microsyenite - A type of microsyenitic-rock. In the Rock Classification Scheme, it is the medium-grained equivalent of foid-bearing-alkali-feldspar-syenite. British Geological Survey Research Report RR/99/06, section 5.1."@en . . . . "Foid-bearing-alkali-feldspar-microsyenite"@en . . "MCFASY"@en . .