. "Foid-bearing-gabbro"@en . . "Foid-bearing-gabbro"@en . . "stable"@en . "Foid-bearing-gabbro - A type of gabbroic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 10' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Foid-bearing-diorite, foid-bearing-gabbro and foid-bearing-anorthosite are separated according to the average composition of their plagioclase and the proportion of mafic minerals (M): if M is greater than 10% and An (the anorthite content of plagioclase) is greater than 50% the rock is foid-bearing-gabbro. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12."@en . "FBGB"@en . .