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 …

Summary: Tuff vs. Tough Is it tuff or tough? Tough is an adjective that means strong or difficult and a verb that means to endure. Tuff is a type of rock, and is used in place of tough in some commercial …

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While tough and tuff sound the same, tough is the established adjective synonymous with resilience and strength. Tuff, on the other hand, is a seldom-used informal alternative or a specific geological term.

The meaning of TUFF is a rock composed of the finer kinds of volcanic detritus usually fused together by heat.

Jan 23, 2026 · Tuff-N-Uff 151 takes place Thursday, January 22, 2026 with 10 fights at The Pearl Theater at the Palms Casino in Las Vegas, Nevada. View fight card, video, results, predictions, and …

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 …