PROC. CAL. ACAD. SCI., 4th Series, Vol. XI 



DICKERSON] Plate 31 



Fig. 1. Petrified forest, five miles from Calistoga. View showing "queen of the for- 

 est," a petrified redwood tree, which was once almost entirely covered by volcanic tuff. 



Fig. 2. A smaller, but more nearly perfect specimen, showing the nature of occurrence 

 in this interesting fossil forest. 



