tZ S.GcoZoqi-raZ Sixrvey. 



Plot? XTVI 



Sta.JUiXIU. 



\tt.Hctyden. 



• ^- V,— 



Vblcanic Foreland on Worth Fork Pierre's JR. (jQooking s.je.) 



«. Vol rani c. h. Archcean. c. JPetl aeovotc. 





^wa,7^4k^^ 





Canon of North JForJc JPterre'Jr JStiver . 



a.. -Lamirhjlerf poryihyritic trachyte. h. Pink trachyte . 



