Tuff, Explosion Tuff, and a Cat

Got to get out the door quick to hound some more ground. A few words here on tuff since I am investigating a tuff formation outside of Las Vegas. See previous posts.

Tuff are rocks formed from solidified or lithified volcanic ash and rock fragments thrown out of a vent. They can be all colors and densities but a common feature are clasts, rock fragments within the tuff. Not all tuff contains clasts but this is very common.

UPDATE: November 11, 2019. Made a better video than the previous. Retains cat content.

Volcanic Tuff and Cat from Thomas Farley on Vimeo.

Most of my tuff reference specimens come from here:

https://geologicalspecimensupply.com/?step=contact_information

I might have found an example of explosion tuff. This is where rocks settled onto the ash, rather than being embedded in it. Need to collect more of that, break some of it open, look for other things while I am out in the field, and on and on. . .

Another look at this possible explosion tuff and a still photo of what I am calling “The Shark”. A single, angular clast sticking out of tuff from the same area. Looks like basalt to me. Is this explosion tuff?

Explosion Tuff? from Thomas Farley on Vimeo.

The Shark

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