GEOLOGY. 207 



sions according to mineralogical and oryctognostical distinc- 

 tions of character at Burlington, and in the descending 

 order : — 



1. Superficial soil - _ - 



2. Chert - 



3. Yellow limestone, with spatic encrinites and 



productae --___. 



4. Calcareous argillaceous marl, with few fossils 



5. Siliceous limestone ----- 



6. Oolitic limestone, with productae - - - 



7. Bluish clay ------ 



8. Yellow compact limestone . - - - 



9. Compact siliceous limestone, with veins of cal- 



careous spar ------ 



10. Oolitic limestone - . - - - 



1 1 . Saccharoidal blue limestone, with veins of cal- 



careous spar, and impressions of small orthis 

 and strophomena ----- 



" The valley of the ' Red Pipestone' extends from N.NW. 

 to S.SE., in the form of an ellipsis ; being about three miles 

 in length, with a breadth, at its smaller axis, of half a mile. 

 It is cradle-shaped, and its slope to the east is a smooth 

 sward, without trees and without rocks. Its slope to the 

 west is rugged, presenting a surface of rocks throughout its 

 whole length, that form a very picturesque appearance, and 

 would deserve a special description if this were the place to 

 do so. But I am now more particularly interested in defining 

 its geological features. 



" The principal rock that strikes the attention of the 

 observer in this remarkable inland bluff is an indurated 

 [metamorphic) sand-rock, or quarzite, the red color of which 

 diminishes in intensity from the base to the summit. It is 



