Smithsonian Report, 1948.—Brown PLATE 7 
1. Cross section of a pillar with silicified dicotyledonous wood (dark). From 
Eden Valley, northeast of Whisky Basin. Natural size. 
’ 
2. Cross section of a pillar with silicified coniferous wood in center. The minute, 
spindle-shaped objects are probably larval cases of midges or microcaddis flies. 
Tonopah, Nev. Natural size. 
