LABORATORY MANUAL 27 



3. Arrange a table to show the character of all the sub- 

 stances tested. 



Add Basic Neutral 



EXERCISE XIX (Textbook 208) 



STUDY OF ROCK FORMATIONS 



PLACE: A hill or mountain where the rocks are exposed; 

 or a cut made through a hill for a road; or rocks on sea, 

 lake, or river shore. 



Upon an extra sheet of paper take notes (to be trans- 

 ferred neatly to the notebook and used in writing results) 

 on each of the topics given below: 



1. The extent of the rock exposed. 



2. The position of the rock. 



3. The color of the rock. 



4. The hardness of the rock. 



5. Difference in color of a freshly broken and a long 

 exposed rock. 



6. The direction of any cracks or natural breaks. 



7. Division of the rocks into horizontal layers. 



8. Presence of crystals or crystalline formations. 



9. Signs of action of air or water, past or present. 



Tell where you found any of the following rocks or min- 

 erals: sandstone, shale, limestone, 'conglomerate, granite, 

 trap, quartz, feldspar, mica. 



State the length of time spent in studying the rocks and 

 making notes. 



RESULTS 



Write, in ink, in well chosen words, a two-page descrip- 

 tion of the rocks you studied, using your notes on every 

 topic given above. The order of the topics need not neces- 

 sarily be followed. 



