طف

For other uses, see طف (توضيح).

Welded tuff from Bandelier National Monument, نيو مكسيكو

طف Tuff، صخر فتاتي ناري، ولكن يتكون من حبيبات بركانية صغيرة.

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 Breccias

18.5 million-year-old tuff exposed at Hole In The Wall, Mojave National Preserve, California.

10 by 15 cm sample of tuff containing angular fragments of other rocks (ألمانيا)

 الصخور النارية

Rocks from the Bishop tuff, uncompressed with pumice on left; compressed with fiamme on left.

 Welded tuff

Welded tuff at Golden Gate in Yellowstone National Park

 الطف ريولايت

Light microscope image of tuff as seen in thin section (Long dimension is several mm). The curved shapes of altered glass shards (ash fragments) are well-preserved, although the glass is partly altered. The shapes were formed about bubbles of expanding water-rich gas.

The rhyolitic tuff portal of the "church house" at Colditz Castle, Saxony, designed by Andreas Walther II (1584), is a clear example of the exuberance of "Antwerp Mannerism"

 الطف بازلت

Most of the moais in Easter Island are carved out of tholeiite basalt tuff

 الطي والتحول

Remains of the ancient Servian Walls in Rome, made of tuff bricks

 الأهمية الإقتصادية

Ahu Tongariki with 15 moai made of tuff from Rano Raraku. The second moai from the left has a Pukao which is made of red Scoria.

 انظر أيضا

• Scoria
• لابة
• Sillar
• Lapilli
• Pyroclastic flow
• Eutaxitic texture

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 المصادر

تحوي هذه المقالة معلومات مترجمة من الطبعة الحادية عشرة لدائرة المعارف البريطانية لسنة 1911 وهي الآن من ضمن الملكية العامة.