These contain flow banding and spherulites up to 10 cm and eutaxitic and fiamme textures.
2.
During welding, the glass shards and pumice fragments adhere together ( necking at point contacts ), deform, and compact together, resulting in a eutaxitic fabric.
3.
Welded tuff textures are distinctive ( termed " eutaxitic " ), with flattened lapilli, fiamme, blocks and bombs forming oblate to discus-shaped forms within layers.
4.
If sufficiently hot when deposited, the particles in an ignimbrite may weld together, and the deposit is transformed into a'welded ignimbrite', made of " eutaxitic lapilli-tuff ".
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