Radiolaria, a kind of plankton, have been living in the ocean from the Paleozoic era to the present. They are unicellular organisms with hard skeletons of various shapes. A major group of radiolaria (Polycystina) makes siliceous skeleton, which is stable in geologic time and often found from marine sediment. Their rapid change and variety in skeleton shapes make them good index fossils. They are about 0.1 - 0.5 mm in size.

Radiolarian skeletons look like beautiful glassworks under microscope. I am making crocheted daily goods with cotton yarn expressing the shape and luster of radiolarians.


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  Keiko Mizugaki, Doctor of Science

1984 - 1985: study on Mesozoic radiolaria at Nagoya University
1986 - 2018: study on geothermal geology at the Geological Survey of Japan

Related papers*
1) Mizugaki, K. (1985) Radiolarian Fossils from the Chichibu System, Northwest of Hamana Lake, Central Japan. Bulletin of the Mizunami Fossil Museum, 12, 171-182. (in Japanese with English abstract)
2) Mizugaki, K. (1987) Mesozoic radiolarians in conglomerate of the Shimanto Supergroup in the Sazara-ura Area, eastern Kii Peninsula, Central Japan. Bulletin of  the Nagoya University Museum, 3, 19-69. (in Japanese with English abstract)
*Please contact me via Twitter (open DM) or the contact form for PDF files.