CHARACTERS.—Olivine scanty. Felspar-lathes of the groundmass in flow-arrangement.
+------------+---------------+------------+------------+--------------+ | SUB-ORDER. | SECTION. | GENUS. | SPECIES. | | +------------+---------------+------------+------------+ | | | Presence or | | | | | Pyroxene | absence of | Character | Length | Number of | | of the | plagioclase | of the | of felspar | specimens. | | groundmass.| phenocrysts. |phenocrysts.| lathes. | | +------------+---------------+------------+------------+--------------+ | | |{ 37. |{ ·02-·1 mm. | 2 | | | |{ Glassy |{ ·1-·2 " | 12 | | | |{ plagioclase|{ ·2-·3 " | 6 | | |{ 19. |{ phenocrysts|{ ·3-·5 " | | | |{ Plagioclase |{ (_vitr._) | | | | |{ phenocrysts |{ | | | | |{ (_phen._) |{ 38. |{ ·02-·1 mm. | | | |{ |{ Opaque |{ ·1-·2 " | 2 | | |{ |{ plagioclase|{ ·2-·3 " | | | |{ |{ phenocrysts|{ ·3-·5 " | | | 10. |{ |{ (_opac._) | | | | Granular |{ | | | | | (_gran._) |{ |{ 39. | | | | |{ |{ Large |{ ·02-·1 mm. |} | | |{ |{ phenocrysts|{ ·1-·2 " |} Not | | |{ |{ of olivine |{ ·2-·3 " |} represented.| | |{ |{ and |{ ·3-·5 " |} | | |{ |{ pyroxene, | | | | |{ 20. |{ over 2 mm. | | | | |{ No |{ (_magn._) | | | | |{ plagioclase |{ | | | | |{ phenocrysts |{ 40. | | | | |{ (_non-phen._)|{ Small | | | | | |{ phenocrysts|{ ·02-·1 mm. | | | | |{ of olivine |{ ·1-·2 " | | | | |{ and |{ ·2-·3 " | 2 | | | |{ sometimes|{ ·3-·5 " | 1 | | | |{ pyroxene, | | | | | |{ under 2 mm.| | | | | |{ (_parv._) | | | | | | | | | | | |{ 41. _Vitr._|} | | | |{ 21. _Phen._ |{ |} |{ Not | | 11. |{ |{ 42. _Opac._|} |{ represented.| | Prismatic |{ | | | | | (_prism._) |{ |{ 43. _Magn._| |{ Not | | |{ 22. |{ | |{ represented.| | |{ _Non-phen._ |{ 44. _Parv._| ·02-·1 mm. | 1 | | | | | | | | 12. | | | | | | Ophitic | | | |{ Not | | (_oph._) | | | |{ represented.| +------------+---------------+------------+------------+--------------+
CHARACTERS.—Felspar lathes or prisms of the groundmass not in flow-arrangement.
+------------+---------------+------------+------------+--------------+ | SUB-ORDER. | SECTION. | GENUS. | SPECIES. | | +------------+---------------+------------+------------+ | | | Presence or | | Length of | Number of | | Pyroxene | absence of | Character | felspar | specimens. | | of the | plagioclase | of the | lathes and | | | groundmass.| phenocrysts. |phenocrysts.| prisms. | | +------------+---------------+------------+------------+--------------+ | | |{ 1. |{ ·02-·1 mm. | 9 | | | |{ Glassy |{ ·1-·2 " | 5 | | | |{ plagioclase|{ ·2-·3 " | 4 | | |{ 1. |{ phenocrysts|{ ·3-·5 " | | | |{ Plagioclase |{ (_vitr._) | | | | |{ phenocrysts |{ | | | | |{ (_phen._) |{ 2. |{ ·02-·1 mm. | 6 | | |{ |{ Opaque |{ ·1-·2 " | 4 | | |{ |{ plagioclase|{ ·2-·3 " | 3 | | |{ |{ phenocrysts|{ ·3-·5 " | 3 | | 1. |{ |{ (_opac._) | | | | Granular |{ | | | | | (_gran._) |{ |{ 3. | | | | |{ |{ Large |} | | | |{ |{ phenocrysts|} |{ Not | | |{ |{ of augite, |} |{ represented.| | |{ 2. |{ over 2 mm. |} | | | |{ No |{ (_magn._) |} | | | |{ plagioclase |{ | | | | |{ phenocrysts |{ 4. | | | | |{ (_non-phen._)|{ Small | | | | | |{ phenocrysts|{ ·02-·1 mm. | | | | |{ of augite, |{ ·1-·2 " | 3 | | | |{ under |{ ·2-·3 " | 1 | | | |{ 2 mm., |{ ·3-·5 " | 2 | | | |{ or none | | | | | |{ (_parv._) | | | | | | |{ ·02-·1 mm. | 1 | | | |{ 5. _Vitr._ |{ ·1-·2 " | 2 | | |{ 3. _Phen._ |{ | | | | 2. |{ |{ 6. _Opac._ | ·1-·2 " | 2 | | Prismatic |{ | | | | | (_prism._) |{ |{ 7. _Magn._ |} |{ Not | | |{ 4. |{ |} |{ represented.| | |{ _Non-phen._ |{ 8. _Parv._ |} | | | | | | | | | | | |{ ·02-·1 mm. | 1 | | | | |{ ·1-·2 " | 3 | | | |{ 9. _Vitr._ |{ ·2-·3 " | 4 | | |{ 5. _Phen._ |{ |{ ·3-·5 " | 7 | | |{ |{ | | | | 3. |{ |{ |{ ·2-·3 mm. | 1 | | Ophitic |{ |{ 10. _Opac._|{ ·3-·5 " | 1 | | (_oph._) |{ | | | | | |{ |{ 11. _Magn._| | | | |{ 6. |{ | | | | |{ _Non-phen._ |{ 12. _Parv._|{ ·2-·3 mm. | 3 | | | | |{ ·3-·5 " | 3 | +------------+---------------+------------+------------+--------------+