Tuff - Wikipedia Tuffs are further classified by their depositional environment, such as lacustrine tuff, subaerial tuff, or submarine tuff, or by the mechanism by which the ash was transported, such as fallout tuff or ash flow tuff
tuff - 维基词典，自由的多语言词典 Its Tuff-n-Tiny USB flash drive is about the size of a thumbnail … The company insists that the "tuff" part of the name is well-earned for being waterproof, dustproof and you can drive a car over it
Tuff | Volcanic Ash, Igneous Rock Pyroclastic Material - Britannica Some of the world’s largest deposits of vitric tuff are produced by eruptions through a large number of narrow fissures rather than from volcanic cones In extensive deposits, tuff may vary greatly not only in texture but also in chemical and mineralogical composition