384 



C. A. SUSSMILCH AND W. G. STONE. 



Table of Analyses. 





I. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



SiO., 



74-18 



50-05 



53-G2 



60-95 



62-85 



70-40 



63-22 ; 



ai 2 o 3 ... 



11-15 



19-56 



12-10 



15-04 



13-58 



13-13 



13 57 



Fe 2 O s ... 



0-90 



0-90 



2-00 



2-60 



1-95 



1-25 



1-50 



FeO 



1-31 



6-48 



6-30 



3-69 



5-45 



1-75 



2-07 



MgO 



0-62 



6-30 



7-07 



2-82 



1-92 



0-64 



1-80 



CaO 



1-35 



5-20 



11-64 



4-30 



4-10 



2-74 



4-56 



Na^O ... 



1-00 



2-49 



1-84 



3-22 



3-32 



3-47 



0-98 



K 2 



5-86 



3-09 



1-52 



3-00 



0-88 



2-22 



3-82 



H 2 O(100°C) 



0-15 



0-43 



0-22 



0-17 



0-20 



0-15 



0-26 



H„O(100°CH 



-) 1-27 



3-90 



1-86 



2-08 



2-50 



1-35 



2-10 



CO, 



2-00 



0-32 



1-12 



0-80 



1-85 



2-83 



6-01 



TiOo 



0-25 



0-55 



0-50 



0-65 



0-90 



0-30/ 



0-50 



Zr0 2 ... 



absent 



absent 



absent 



absent 



absent 



absent 





P 2 5 ... 



0-15 



0-38 



0-29 



0-26 



0-18 



0-08 





so 3 



trace 



0-03 



0-02 



0-02 



trace 



trace 





CI 



trace 



trace 



trace 



trace 



trace 



trace 





S(FeS 2 ) ... 



o-oi 



trace 



trace 



absent 



absent 



absent 





Cr 2 3 ... 



absent 



absent 



absent 



absent 



absent 



absent 





NiO & CoO 



absent 



trace 



trace 



trace 



absent 



absent 





MnO 



0-02 



0-09 



0-17 



0-08 



0-14 



0-04 



0-09 



BaO 



0-10 



0-15 



0-04 



0-13 



0-10 



0-04 





SrO 



trace 



trace 



trace 



trace 



trace 



trace 





Li 2 ... 



absent 



absent 



absent 



absent 



absent 



absent 





v a o s ... 



absent 



0-05 



0-02 



0-02 



trace 



absent 





CuO 



trace 

 100-32 





100-33 



trace 



trace 



trace 





99-97 



99-83 



99-92 



100-39 



100-48 



I. — Rhyolite-porphyry from near Grand Arch. 

 II. — Andesite (fine grained, non-porphyritic type) from near 

 Caves House. 

 III. — Augite-andesite (porphyritic type) occurring as inclusions in 



II. from near Caves House. 

 IV. — Granophyric-quartz-porphyrite (pink variety). 

 V. — Quartz-porphyrite (green variety). 



VTT i Q uar tz-felsite from road cutting at head of Hinchman's Crk. 



