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Attached is a photomicrograph of gabbro. In the center a plagioclase phenocryst occurs that includes many clinopyroxene and hornblende minerals. The phenocryst was albitized. The matrix around the...
06 August 2015 2,321 7 View
My samples were collected from a suite of metamorphic basic intrusive rocks that include plagioclase amphibolite shist, troctolite and anorthosite. These rocks consist of hornblende, plagioclase...
08 November 2014 8,007 10 View
I have several specimens that contain millimeter-sized mafic magmatic enclaves hosted by centimeter-sized mafic magmatic enclave in granodiorite and want to know their genesis.
20 November 2013 4,198 2 View