U. § GEOLOGICAL SURVEY BULLETIN 611 PLATE VI 
Co a re, 
A, SILICIFIED STUMP IN PYRAMID PARK, N. DAK. 
A remnant of one of the big trees of the Fort Union forest, now a mass of stone resting on a pedestal cf soft 
clay. Photigresls by Haynes, St. Paul, Minn. 
Be THE “PROW: OF THE eden! ONE OF THE BUTTES OF PYRAMID PARK, N. DAK. 
over tne gr —. long after the main mass has 
Note the concretior hich weather ou and c 
been muon: pr sSovctnasor by aves St. Pau! 
