Eufodite Gabbro

"Eufodite" gabbros (old term for coarse-grained gabbros) are very coarse-grained gabbroic rocks. they contain plagioclase (labradorite) commonly altered in saussurite and a diallage pyroxene, commonly altered in chlorite or zoisite. The Type locality for this type of gabbro is the south Tuscany and Liguria regionns in Italy.

Bibliography

• Cox et al. (1979): The Interpretation of Igneous Rocks, George Allen and Unwin, London.
• Howie, R. A., Zussman, J., & Deer, W. (1992). An introduction to the rock-forming minerals (p. 696). Longman.
• Le Maitre, R. W., Streckeisen, A., Zanettin, B., Le Bas, M. J., Bonin, B., Bateman, P., & Lameyre, J. (2002). Igneous rocks. A classification and glossary of terms, 2. Cambridge University Press.
• Middlemost, E. A. (1986). Magmas and magmatic rocks: an introduction to igneous petrology.
• Shelley, D. (1993). Igneous and metamorphic rocks under the microscope: classification, textures, microstructures and mineral preferred-orientations.
• Vernon, R. H. & Clarke, G. L. (2008): Principles of Metamorphic Petrology. Cambridge University Press.

Photo
Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)	Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. XPL image, 2x (Field of view = 7mm)	Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)
Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. XPL image, 2x (Field of view = 7mm)	Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. the two crystals with high interference colors are Epidote. XPL image, 2x (Field of view = 7mm)	Plagioclase alterd by sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)
Plagioclase alterd by sericite and Epidote. XPL image, 2x (Field of view = 7mm)	Fibrous amphiboles after Pyroxene. XPL image, 10x (Field of view = 2mm)	Fibrous amphiboles after Pyroxene. XPL image, 10x (Field of view = 2mm)
Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)	Deformed Pyroxene crystal. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
Deformed Pyroxene crystal. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)	Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)
Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)