Subsurface Laboratory Methods 



109 



J'lGURi 48. Carboniferous plant spores from Daggett County, Utah. Numbers 1-4, 

 Triletes; 5-10, Punctati; 11-15 Granulati; 16-17, Denso-sporites. All about 400X, 

 except 1-3 (SOX). (From Schemel, Jour. Paleontology.) 



