Gabbro rock. Polarised light micrograph of a section through gabbro,an igneous rock. Gabbro is coarse-grained,containing the minerals olivine and plagioclase feldspar. Olivine is recognised here by its irregular shaped crystals,with randomly oriented fractures. Plagioclase feldspar forms lath-shaped (long and slender) crystals. Extensive deposits are found in South Africa,USA and Canada | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
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