1907 - 8 .] 
Classification of Igneous Eocks. 
159 
Groups. 
Metarhyolite, 5. 
Miascite, 16. 
Mica andesite, 42. 
dacite, 13. 
diabase, 38, 48. 
diorite, 26, 40, 46. 
hornblendite, 59. 
porphyry, 36. 
syenite, 20, 30. 
trachyte, 26. 
trap, 43, 45, 46. 
Micro-essexite, 40. 
Micro-monsonite, 30. 
Micro-oline granite, 13. 
Minette, 20, 26, 41, 41, 42. 
Monchiquite, 43, 45, 55, 63. 
glassy, 47. 
Monzoni, 43. 
Monzonite, 41, 45. 
Mugearite, 35. 
Nepheline aplite, 31. 
basalt, 54, 55, 56, 56, 56, 59, 63, 63, 63, 64. 
basanite, 64. 
gabbro, 45. 
porphyry, 29. 
rock, 38. 
syenite, 29, 31, 32, 63. 
Nephelinite, 31, 47, 47, 53. 
basanite, 62. 
porphyry, 32. 
syenite, 31, 32, 32. 
Nevadite, 5. 
Nordjurkite, 28, 
Norite, 36, 36, 39, 40, 40, 40, 42, 47, 51, 57. 
Nosean sanidinite, 31. 
Obsidian, 2, 6, 6, 9, 11, 11. 
Oligo-oclase rock, 21. 
Olivine barkevikite gabbro, 46. 
basalt, 34, 34, 40, 44, 49, 54, 63. 
basalt lava, 49. 
diabase, 49. 
diall, rock, 57. 
dolerite, 44, 49. 
gabbro, 44, 45, 61, 61. 
gabbro diabase, 53. 
hyp. diabase, 50. 
nephelinite, 55. 
pyr. andesite, 33. 
segregation, 58. 
tephrite, 56. 
weisselbergite, 41. 
Orendite, 26. 
Orthoclase gabbro, 35. 
Orthophyre, 20, 20. 
Ouachite, 56, 64. 
Palae picrite, 59. 
Palagonite tuff, 23. 
Pantellerite, 17, 19, 19. 
Groups. 
Pegmatite, 9. 
Peridodite, 57, 58. 
Phonolite, 15, 16, 27, 29, 29, 29, 29, 29, 29, 
30, 30, 31, 31, 31, 31. 
obsidian, 19. 
Picrite, 50, 50, 57, 59, 59, 59, 59, 59, 59, 60, 
60, 60, 62. 
porphyrite, 59. 
Pinto diorite, 37. 
Pitch stone, 1, 1, 3, 4. 
porphyry, 3. 
Plagioclase basalt, 34, 38, 43, 43, 46, 51. 
Porphyrite, 20, 20, 24, 26, 37. 
Porphyritic felsite, 10. 
Porphyritoid, 18. 
Porphyroid, 1, 1, 1, 2, 10, 11, 17. 
Porphyry, 4, 6, 7, 10, 12, 13, 14, 18, 34. 
(orthoclase), 12. 
schistose, 12. 
Pot. soda felsite, 6, 11, 13. 
Propylite, 19, 22, 25. 
Protogine, 27. 
Pulaskite, 15, 27, 30. 
Pumice, 5, 5, 9, 16, 17, 22. 
Pyroxene, 22. 
andesite, 22, 34, 37, 37, 37, 38. 
apatite syenite, 41. 
granitite, 26. 
hornbl. dacite, 21. 
peridodite, 58. 
porphyrite, 34. 
syenite, 14. 
Pyroxenite, 57, 57, 59, 63. 
Quartz amphibolite, 56. 
banakite, 28. 
basalt, 25, 25, 37, 41, 41. 
bostonite, 7. 
diabase, 55. 
diorite, 33, 37, 41. 
gneiss, 33. 
porphyrite, 4, 10. 
felsite, 6, 12, 12. 
gabbro, 35. 37. 
hornbl. mica porphyrite, 22. 
keratophyre, 1, 7, 11, 19. 
mica diorite, 23. 
monzonite, 12, 18. 
norite, 25, 41. 
porphyry, 2, 3, 3, 4, 4, 5, 5, 9, 10, 11, 11, 
11, 11, 11, 11, 12, 12, 12, 13, 14. 
porphyrite, 12, 17. 
pyr. diorite, 22. 
syenite, 20 
porphyry, 13. 
tourm. porphyry, 5. 
trachyte andesite, 11. 
Rapakiwi, 6. 
porphyry, 11. 
Rliomben porphyry, 32. 
