Cluster of euhedral olivine phenocrysts. Makaopuhi Lava Lake, Hawaii. n.d.
Crystallization of basalt in Makaopuhi lava lake, Hawaii
Summary
The area shown in each slide is approximately 0.9 x 1.2 mm. Olivine phenocrysts are as much as 2 mm in longest dimension, but average close to 0.5 mm. Clinopyroxene crystals are small and equant, rarely exceeding 0.1 mm in length and close to 0.01 mm in their short dimension. Slide 1 shows a cluster of euhedral olivine phenocrysts in a matrix of light brown glass sprinkled with tiny equant pyroxene crystals and a few crystals of plagioclase, which has just begun to crystallize. A flat plate of newly formed plagioclase is seen in one corner of the slide. Published as Slide 1 in U.S. Geological Survey publication titled, Crystallization of basalt in Makaopuhi lava lake, Hawaii: descriptive material to accompany set of 7 colored [...]
Summary
The area shown in each slide is approximately 0.9 x 1.2 mm. Olivine phenocrysts are as much as 2 mm in longest dimension, but average close to 0.5 mm. Clinopyroxene crystals are small and equant, rarely exceeding 0.1 mm in length and close to 0.01 mm in their short dimension.
Slide 1 shows a cluster of euhedral olivine phenocrysts in a matrix of light brown glass sprinkled with tiny equant pyroxene crystals and a few crystals of plagioclase, which has just begun to crystallize. A flat plate of newly formed plagioclase is seen in one corner of the slide.
Published as Slide 1 in U.S. Geological Survey publication titled, Crystallization of basalt in Makaopuhi lava lake, Hawaii: descriptive material to accompany set of 7 colored slides illustrating "Crystallization of basalt in Makaopuhi lava lake, Hawaii".
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Available in the USGS Denver Library Photographic Collection, 2017 DENPH00002, Wright, Thomas L. digital collection (all images are jpegs).
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