F. L. Ransome — Lava Flows of California. 



365 



rate with the minor importance of their plntonic equivalents. 

 Together with the establishment of new families there has 

 come into the literature an enormous number of new rock 

 names. In many cases these names are local, being based on 

 mineralogical combinations and distinctions that may not be 

 repeated in another region, or given the same values by another 

 observer. The common custom of providing such facies with 

 a name, derived from the locality in which they occur, is a 

 useful one, but the local, and to a certain extent provisional, 

 nature of such names should be borne in mind, and they 

 should not be allowed to bury under their accumulating mass 

 broader and more rational schemes of classification. 



Comparative Table of Chemical Analyses. 





I. 



II. 



III* 



IY. 



V* 



VI. 



vit. 



VIIL 



IX* 



X.* 



XI. 



XII. 



Si0 2 .__ 



55 44 



55-69 



56-19 



56-76 



56-78 



57-97 



5867 



59-41 



59-43 



5988 



60-03 



60-88 



Ti0 2 



•16 



tr. 



■69 





11 5 







01 



1-38 









A1 2 3 



I860 

 2-09 



1908 

 4-07 



16-76 

 3-05 



1679 

 2-07 



16-86 

 3-56 



17-65 

 •63 



15-07 



17-92 



1-71 



16-68 

 254 





17-05 

 1-83 



1619 



Fe 2 3 ... 



537 



FeO 



4-48 



3 26 



4-18 



695 



293 



7-50 



835 



2-40 



3-48 





4-15 



1-58 



MnO 





tr. 



•10 







•09 







tr. 





•09 





MgO 



4-75 



3-41 



3-79 



1-63 



3'41 



1 71 



297 



2 99 



1-84 





1-12 



2-96 



CaO 



6-75 



6-87 



653 



601 



657 



553 



8-07 



465 



4-09 



5 09 



6-58 



5-88 



BaO 







•19 













•14 









SrO 







tr. 













tr. 









Na 2 



1-79 

 663 



2-89 

 4-41 



2-53 

 4-46 

 tr. 



2-43 



4-67 



3-19 



3-48 



1 50 

 5-31 



336 

 3-50 



263 



560 



372 

 5-04 



390 

 5-06 



2 31 

 512 



3-11 



K 2 



3-95 



Li 2 





P a 5 



tr. 





•55 

 •66 



•17 



•42 

 1-21 



•42 





•87 



•58 

 •72 





•42 





H 2 above 1 1 0° 





H 2 below 110° 







•34 





•15 









•27 









Ig. or total H 2 



•25 



•17 





2-44 



CCV18 



1-82 



•82 



1-30 



ZKV08 





1-42 



•98 





10075 



99-85 



100-02 







100-13 



100-81 





CI 05 



_ 







Totals 



100-22 



99-89 



99-49 



100-04 



100-12 



10070 



Si0 2 



Ti0 2 . 



A1 2 3 



Fe 2 3 



FeO 



MnO 



MgO 



CaO 



BaO 



SrO 



Na 2 



K 2 



Li 2 



P 2 5 



H 2 OabovellO c 

 H 2 below 110 c 

 Ig. or total H 2 



Total 



XIIL* 



XIY. 



XY. 



61-09 



61-44 



61-93 





]7-08 



1847 





3-67 



1-93 





2 42 



2-23 





114 



266 1 



4-94 



6-21 



431 



3-69 



4 06 



2-92 



527 



386 



392 





204 



2-28 











101-92 



10065 



XVL* XVII. 'XVIII. 



62-33 63-17 



1-05 

 17-35 17-15 



2-98 



1-63 



•08 



1-05 



3-23 



•24 



•44 



4-21 



4-46 



tr. 



•29 



•75 



•44 



FeS 2 -08 

 C -11 



2-84 

 1-31 



2-17 

 4-17 



3-08 

 4-19 



2-51 



63-49 

 tr. 



18-40 



2 44 



1-09 



•16 



•66 



2-30 



5-70 



4-b2 



XIX.* XX. XXI. 



65-81 5847 60 97 



■54 



■51 



15 11 18-80 20-92 



tr. 



1-04 



C0 2 tr. 



1-85 

 1-40 



•37 



1-98 



•10 



259 

 524 



•23 



3-34 



2 64 



•13 



2-69 



6-60 



•09 



•o;. 



201 



tr. 

 ■Tl 

 •92 

 •14 



3-81 



503 



XXII. XXI 1 1 



57-29 

 •7 2 



6089 

 •49 



1845 17-14 



4-38 

 1 20 



tr. 

 2-08 



It: 

 5-43 



■83 



10 



2-1S 



332 



•95 



•09 



1-16 



358 



i :»l 



5-71 



■2 7 



1-61 



NiO-12NiO-19 



100-19 100-42 100*3] 



* Sierra Nevada latites. 



