Very large and cavernous spherulites are called lithophysae; they are found in obsidians at Lipari, in Yellowstone Park and other places. The characteristic radiate fibrous structure is usually conspicuous, but the fibers are interrupted by cavities that are often arranged as to give the spherulite a resemblance to a rosebud with folded petals separated by arching interspaces. Some of these lithophysae are several centimeters or more in diameter. Tridymite, fayalite and other mi… WebLithophysae synonyms, Lithophysae pronunciation, Lithophysae translation, English dictionary definition of Lithophysae. or n a cavity or hollow found in volcanic rocks, caused by expanding gas Collins English Dictionary – Complete and …

Radon and thoron emission from lithophysae-rich tuff under …

WebIn geology, spherulites containing cavities are also called lithophysae, so Weber's "megaspherulites" are thundereggs. Now the alteration products of the perlite were found to be montmorillonite, a clay mineral complex of … WebThe lava flow carapace revesiculated during extrusion (primary vesiculation), whereas secondary vesiculation (spherulites and lithophysae) was associated with groundmass … taken electric chair

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WebThe Formation of Thundereggs (Lithophysae) Robert Colburn. Robert Colburn, 2000 - Geodes. 0 Reviews. Reviews aren't verified, but Google checks for and removes fake … WebConcentric shells of aphanitic material enclosing a hollow core, which form rounded masses a few centimetres in diameter within glassy or aphanitic, felsic igneous rocks. The hollow, … Web22 jun. 2009 · xiii lithophysae in the lithoidite of obsidian cliff, natural size. The partition walls are generally very thin and often close together, in one instance fifty occurring … twitch amazon prime video