tuya

The latest Eruptions Word of the Day is "Tuya". So, what is a tuya? This is a tuya: A tuya! Click on the image to see a larger version. Image by Erik Klemetti. Alright, well, that doesn't entirely help, does it? Lets look at the feature the arrow indicates. Some observations: (1) It is low and broad. (2) It has a relatively flat top. (3) It is steep-sided. (4) If you look real close, you can see crudely columnar jointing in the some of the outcrops near the top. (5) If you had a piece of it in your hand, you'd know it was a volcano rock (andesite, very rarely you can find bits that are quite…