La Garita is also the source of at least 7 major eruptions of welded tuff deposits over a span of 1.5 million years since the Fish Canyon Tuff eruption.
22.
Most lapilli tuffs which remain in ancient terrains are formed by the accumulation and " welding " of semi-molten lapilli into what is known as a welded tuff.
23.
Welded tuff textures are distinctive ( termed " eutaxitic " ), with flattened lapilli, fiamme, blocks and bombs forming oblate to discus-shaped forms within layers.
24.
A deposit of partly welded tuff up to thick extends from the remnant cone northwest across the Caldera Two boundary fault, to slightly beyond the inferred location of the Caldera One boundary fault.
25.
In Gadeb, Ethiopia, fragments of welded tuff that appeared to have been burned were found in Locality 8E but re-firing of the rocks might have occurred due to local volcanic activity.
26.
It was first described in 1953 for the occurrence in the Khavokiperskiye deposit, Lower Tunguska River, Evenkiysky District, Siberia, Russia, where it occurs in vugs within a quartz vein in welded tuff.
27.
Many igimbrites are loose, unconsolidated deposits, but some exhibit welding, giving the ignimbrite the texture of a solid rock mass, hence the terms commonly used to describe these examples : welded tuff and welded ashflow.
28.
The formation that makes up Yucca Mountain was created by several large eruptions from a caldera volcano and is composed of alternating layers of ignimbrite ( welded tuff ), non-welded tuff, and semi-welded tuff.
29.
The formation that makes up Yucca Mountain was created by several large eruptions from a caldera volcano and is composed of alternating layers of ignimbrite ( welded tuff ), non-welded tuff, and semi-welded tuff.
30.
The formation that makes up Yucca Mountain was created by several large eruptions from a caldera volcano and is composed of alternating layers of ignimbrite ( welded tuff ), non-welded tuff, and semi-welded tuff.
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