CHARACTERS.—Olivine in abundance. Felspars of the groundmass in flow-arrangement.
+------------+---------------+------------+------------+--------------+ | SUB-ORDER. | SECTION. | GENUS. | SPECIES. | | +------------+---------------+------------+------------+ | | | Presence or | | | Number of | | Pyroxene | absence of | Character | Length | specimens. | | of the | plagioclase | of the | of felspar | | | groundmass.| phenocrysts. |phenocrysts.| lathes. | | +------------+---------------+------------+------------+--------------+ | | |{ 13. |{ ·02-·1 mm. | 3 | | | |{ Glassy |{ ·1-·2 " | 2 | | | |{ plagioclase|{ ·2-·3 " | 1 | | |{ 7. |{ phenocrysts|{ ·3-·5 " | | | |{ Plagioclase |{ (_vitr._) | | | | |{ phenocrysts |{ | | | | |{ (_phen._) |{ 14. |{ ·02-·1 mm. | | | |{ |{ Opaque |{ ·1-·2 " | 3 | | |{ |{ plagioclase|{ ·2-·3 " | | | |{ |{ phenocrysts|{ ·3-·5 " | | | |{ |{ (_opac._) | | | | 4. |{ | | | | | Granular |{ |{ 15. | | | | (_gran._) |{ |{ Large |{ ·02-·1 mm. | 2 | | |{ |{ phenocrysts|{ ·1-·2 " | | | |{ |{ of olivine |{ ·2-·3 " | | | |{ |{ and |{ ·3-·5 " | | | |{ |{ pyroxene, | | | | |{ |{ over 2 mm.| | | | | |{ (_magn._) | | | | |{ 8. |{ | | | | |{ No |{ 16. |} | | | |{ plagioclase |{ Small |} | | | |{ phenocrysts |{ phenocrysts|} | | | |{ (_non-phen._)|{ of olivine |}·02-·1 mm. | 1 | | | |{ and |} ·1-·2 " | 5 | | | |{ pyroxene, |} ·2-·3 " | 2 | | | |{ under 2 mm.|} ·3-·5 " | 1 | | | |{ Pyroxene |} | | | | |{ scanty and|} | | | | |{ often |} | | | | |{ absent | | | | | |{ (_parv._) | | | | | | | | | | | |{ 17. _Vitr._|} | | | |{ 9. _Phen._ |{ |} | | | 5. |{ |{ 18. _Opac._|} |{ Not | | Prismatic |{ | |} |{ represented.| | (_prism_.) |{ |{ 19. _Magn._|} | | | |{ 10. |{ |} | | | |{ _Non-phen._ |{ 20. _Parv._|} | | | | | | | | | | |{ 21. _Vitr._|} | | | |{ 11. _Phen._ |{ |} | | | 6. |{ |{ 22. _Opac._|} |{ Not | | Ophitic |{ | |} |{ represented.| | (_oph._) |{ |{ 23. _Magn._|} | | | |{ 12. |{ |} | | | |{ _Non-phen._ |{ 24. _Parv._|} | | +------------+---------------+------------+------------+--------------+
CHARACTERS.—Olivine scanty. Felspars of the groundmass not in flow-arrangement.
+------------+---------------+------------+------------+--------------+ | SUB-ORDER. | SECTION. | GENUS. | SPECIES. | | +------------+---------------+------------+------------+ | | | Presence or | | Length | Number of | | Pyroxene | absence of | Character | of felspar | specimens. | | of the | plagioclase | of the | lathes and | | | groundmass.| phenocrysts. |phenocrysts.| prisms. | | +------------+---------------+------------+------------+--------------+ | | |{ 25. |{ ·02-·1 mm. | 1 | | | |{ Glassy |{ ·1-·2 " | 13 | | |{ 13. |{ plagioclase|{ ·2-·3 " | 5 | | |{ Plagioclase |{ phenocrysts|{ ·3-·5 " | | | |{ phenocrysts |{ (_vitr._) | | | | |{ (_phen._) |{ | | | | |{ |{ 26. |{ ·02-·1 mm. | | | |{ |{ Opaque |{ ·1-·2 " | 4 | | |{ |{ plagioclase|{ ·2-·3 " | | | |{ |{ phenocrysts|{ ·3-·5 " | | | 7. |{ |{ (_opac._) | | | | Granular |{ | | | | | (_gran._) |{ |{ 27. | | | | |{ |{ Large |{ ·02-·1 mm. |} | | |{ |{ phenocrysts|{ ·1-·2 " |} Not | | |{ |{ of olivine |{ ·2-·3 " |} represented.| | |{ |{ and |{ ·3-·5 " |} | | |{ 14. |{ pyroxene, | | | | |{ No |{ over 2 mm.| | | | |{ plagioclase |{ (_magn._) | | | | |{ phenocrysts |{ | | | | |{ (_non-phen._)|{ 28. | | | | | |{ Small | | | | | |{ phenocrysts|{ ·02-·1 mm. |} | | | |{ of olivine |{ ·1-·2 " |} Not | | | |{ and |{ ·2-·3 " |} represented.| | | |{ sometimes |{ ·3-·5 " |} | | | |{ pyroxene, | | | | | |{ under 2 mm.| | | | | |{ (_parv._) | | | | | | | | | | | |{ 29. _Vitr._|} | | | |{ 15. _Phen._ |{ |} | | | 8. |{ |{ 30. _Opac._|} |{ Not | | Prismatic |{ | |} |{ represented.| | (_prism_.) |{ |{ 31. _Magn._|} | | | |{ 16. |{ |} | | | |{ _Non-phen._ |{ 32. _Parv._|} | | | | | | | | | | | |{ ·02-·1 mm. | | | | |{ 33. _Vitr._|{ ·1-·2 " | 3 | | |{ 17. _Phen._ |{ |{ ·2-·3 " | 1 | | 9. |{ |{ |{ ·3-·5 " | 2 | | Ophitic |{ |{ | |{ Not | | (_oph_.) |{ |{ 34. _Opac._| |{ represented.| | |{ | | | | | |{ |{ 35. _Magn._|} |{ Not | | |{ 18. |{ |} |{ represented.| | |{ _Non-phen._ |{ 36. _Parv._|} | | +------------+---------------+------------+------------+--------------+