Thanks Ron! I was sure I knew what they were and the history behind them, but I have been out east for 20 years now. The memory fades with age! The lava flows around Albuquerque are filled with these. Unfortunately, the government is not doing an appropriate job of protecting these heritage sites and are letting developers build right next to them or destroy them.

Very sad. I also have travelled to many spots in the southwest specifically to see these drawings. One of my favorite places is Chaco Canyon and the mesa there is full of these drawings, including one that they believe is an early calendar.... Pretty amazing!