Cochise College        Student Presentation

                          Geology Home Page

                          Roger Weller, geology instructor


Creating Thin Sections
by Jill Forsythe
text     equipment     process     chart     samples     references

Thin Section Process-14 Steps


1. The section to be cut is marked on the rock specimen.  


Text Box: 2. Cut the rock or core 
sample using the masonry saw. 



Text Box: 3. This is the section from the rock specimen.  Next it needs to be ground down to a smooth surface to be glued to the slide.


Text Box: 4. Grind the thin cut specimen with 200 grit silicon carbide.



Text Box: 5. Then grind the specimen 
further with 400 grit, and 
then 600 grit. 



Text Box: 6. You should have a smooth specimen to 
put on the hot plate.


Text Box: 7. Each specimen is heated 
on the hot plate to 340 degrees Fahrenheit.  The slides are 
also heated.



Text Box: 8. Rub the rock specimen
 with Thermoplastic Quartz
 Cement, being sure to cover
 the entire smooth surface
 that you ground down.



Text Box: 9. Rub the heated slide with the Thermoplastic Quartz Cement.  Once again be sure to cover the entire surface.



Text Box: 10. Place the slide over the
rock specimen and press
down firmly to push all air bubbles out.  Remove from
 heat and let cool.



Text Box: 11. Use a guide to cut your one centimeter rock 
specimen on the masonry 
saw down to a smaller thickness.



Text Box: 12. This is the rock specimen size before grinding down
to .03 microns.



Text Box: 13. Grind the thin section on the lapidary wheel using 200 grit first.



Text Box: 14. Use perma mount to put a cover on the slide.  Be sure to label the slide.