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GRÖNLUND, TUULIKKI, 1986: Diatomite deposit in the basin of Lake Soijärvi, central Finland. Bull. Geol. Soc. Finland 58, part 2, Diatomite and underlying diatomaceous gyttja are met with in the overgrown Soijärvi basin at Karttula. Diatomite is considered a material containing abundant diatoms and with a Si0 2 content of 60 %; diatomaceous gyttja has a Si0 2 content of 20-60 The diatom stratigraphy of the Soijärvi sequence was studied. The diatomitedoi:10.17741/bgsf/58.2.004 fatcat:sk6tlkn4avg2vdlijemvdopslm