XVII 



SYNOPSIS 



243 



Third Order of the Olivine-Basalts. 



Characters. — Olivine scanty. Felspars of the groundmass not 



in flow-arrangement. 



Formula. — Oliv., matr., pauc, non-flu. 



Sub-order. 



Pyroxene 



of the 



groundmass. 



7- 



Granular 



{gran. ) 



8. 

 Prismatic 



{prism.) 



9- 



Ophitic 



(oph.) 



Section. 



Presence or 

 absence of plagio- 

 clase phenocrysts. 



Genus. 



Character 



of the 



phenocrysts. 



Plagioclase 



phenocrysts 



{phen.) 



14. 



No plagioclase 

 phenocrysts 

 {non-phen.') 



I' 



I, 



5. Phen. 



6. Non-phen. . 



17. Phen. 



18. Non-phen. 



f 2 5-. 



Glassy plagioclase 



phenocrysts 

 {vitr. ) 



26. 



Opaque plagioclase 



phenocrysts 



{opac. ) 



r 27. 



Large phenocrysts 

 of olivine and 

 pyroxene, over 

 2 mm. (magn.) 



28. 

 Small phenocrysts 

 of olivine and some- 

 times pyroxene, 

 under 2 mm. {parv. ) 



Species. 



Number of 



Length of specimens. 



felspar lathes 



and prisms. 



•02- 

 •1- 

 •2- 



J 2- 



r33- Vitr - 



v 34. Opac. . 

 J 35- Magn. 

 { 36. Parv. 



•02- 

 •I- 



•02- 

 •I- 

 •2- 



L "3- 



'I mm. 



•2 ,, 

 3 " 

 5 » 



"I mm. 

 •2 ,, 



'5 » 



■1 mm. 



•02- 

 •1- 



•2- 



■1 mm. 

 •2 ,, 

 •3 „ 



•5 ,> 



1 

 13 



5 



1 



Not repre- 

 sented. 



Not repre- 

 sented. 



/ Not repre- 

 \ sented. 



3 

 1 

 2 



Not repre- 

 sented. 



Not repre- 

 sented. 



R 2 



