12 FOSSIL rOEESTS OF YELLOWSTONE FAEK. 



On the steep hillside a short distance below the big tree just men- 

 tioned are the two trunks shown in figure 5. They are about 2 feet 



Fig. 5. — Upright trunks in Specimen Ridge fossil forest. 



in diameter and 25 feet high, and stand some 20 feet apart, and we 

 may imagine them to have formed the doorposts of the " ancient 



