1. Figure 6. Pairs of photomicrographs taken at 4X under plane (left) and cross-polarized (right) light for each fabric class ordered from top to bottom: Altered Sand in Fine-grained Matrix (AS-F;Altered Sand in Glassy Matrix (AS-G, PP 260), Volcanic Glass (VG, PP 203), and Rounded Pumice (RP, PP 207)
2. Prehistoric Warfare in Central Arizona, USA: Assessing Its Scale with Ceramic Chemistry;David R Abbott;Geoarchaeology,2013
3. Fissure ignimbrites: Fissure-source origin for voluminous ignimbrites of the Sierra Madre Occidental and its relationship with Basin and Range faulting;Gerardo J Aguirre-D�az;Caldera Volcanism: Analysis, Modelling and Response,1964