Monday, July 12, 2010
so what's a tuya? this is a tuya.
(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 glassy).
(6)(And right next door to this feature is a reddish cone that is obviously a cinder/scoria cone.