Tuff
Photographed by Michael P. Klimetz
Welded Tuff
MEXICO
Tuff is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption. Welded tuff is a pyroclastic rock, of any origin, that was sufficiently hot at the time of deposition to weld together. Strictly speaking, if the rock contains scattered pea-sized fragments [or fiamme], it is called a welded lapilli-tuff. Welded tuffs (and welded lapilli-tuffs) can be of fallout origin, or deposited from pyroclastic density currents, as in the case of ignimbrites. During welding, volcanic glass shards and pumice fragments adhere together (necking at point contacts), deform, and compact together, resulting in a characteristically eutaxitic fabric.
Photographed by Michael P. Klimetz
MEXICO
Photographed by Michael P. Klimetz
Welded Vitric Rhyolitic Tuff
(Wonderstone)
UTAH
Photographed by Michael P. Klimetz
[Welded Tuff]
Zacatecas
MEXICO
Photographed by Michael P. Klimetz
Welded Trachytic Tuff
Mount Kenya
KENYA
Photographed by Michael P. Klimetz
Welded Vitric Rhyolitic Tuff
(Wonderstone)
Cretaceous-Eocene
Vernon Hills
Tooele County
UTAH
Photographed by Michael P. Klimetz
Welded Vitric Rhyolitic Tuff
(Wonderstone)
Cretaceous-Eocene
Vernon Hills
Tooele County
UTAH
Photographed by Michael P. Klimetz
Welded Vitric Rhyolitic Tuff
(Wonderstone)
Cretaceous-Eocene
Vernon Hills
Tooele County
UTAH
Photographed by Michael P. Klimetz
Trachytic Tuff
(Sanidine Pyroclasts)
Drachenfels
Koenigswinter
Siebengebirge
North Rhine-Westphalia
GERMANY
Photographed by Michael P. Klimetz
Trachytic Pumaceous Tuff
(Black and Dark Brown Kaersutite Pyroclasts)
Pleistocene
Wannenkoepfe
Eifel
GERMANY
Photographed by Michael P. Klimetz
Trachytic Pumaceous Tuff
(Black and Dark Brown Kaersutite Pyroclasts)
Pleistocene
Wannenkoepfe
Eifel
GERMANY
Photographed by Michael P. Klimetz
Trachytic Pumaceous Tuff
(Black and Dark Brown Kaersutite Pyroclasts)
Pleistocene
Wannenkoepfe
Eifel
GERMANY
Photographed by Michael P. Klimetz
Trachytic Pumaceous Tuff
(Black and Dark Brown Kaersutite Pyroclasts)
Pleistocene
Wannenkoepfe
Eifel
GERMANY
Photographed by Michael P. Klimetz
Andesitic Tuff
Tertiary
Silver Cliff
Custer County
COLORADO
Photographed by Michael P. Klimetz
Andesitic Tuff
Tertiary
Silver Cliff
Custer County
COLORADO
Photographed by Michael P. Klimetz
Andesitic Tuff
Tertiary
Silver Cliff
Custer County
COLORADO
Photographed by Michael P. Klimetz
Andesitic Tuff
Tertiary
Silver Cliff
Custer County
COLORADO
Photographed by Michael P. Klimetz
Andesitic Tuff
Tertiary
Silver Cliff
Custer County
COLORADO
Photographed by Michael P. Klimetz
Sanidine-Orthoclase Tuff
Pliocene
Panaca Formation
Panaca
Lincoln County
NEVADA
Photographed by Michael P. Klimetz
Sanidine-Orthoclase Tuff
Pliocene
Panaca Formation
Panaca
Lincoln County
NEVADA
Photographed by Michael P. Klimetz
Sanidine-Orthoclase Tuff
Pliocene
Panaca Formation
Panaca
Lincoln County
NEVADA
