SECOND ORDER OF THE HYPERSTHENE-AUGITE ANDESITES.

CHARACTERS.—Felspar-lathes in flow-arrangement.

Observations of a Naturalist in the Pacific Between 1896 and 1899, Volume 1 — Part 218

+------------+---------------+-------------+-----------+--------------+ | 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. |} | | | | |{ Glassy |}·02-·1 mm.| 9 | | | |{ plagioclase |} ·1-·2 " | 2 | | |{ 7. |{ phenocrysts |} | | | |{ Plagioclase |{ (_vitr._) |} | | | |{ phenocrysts |{ | | | | |{ (_phen._) |{ 14. |} | | | |{ |{ Opaque |} |{ Not | | |{ |{ phenocrysts |} |{ represented.| | |{ |{ of |} | | | 4. |{ |{ plagioclase|} | | | Granular |{ |{ (_opac._) | | | | (_gran._) |{ | | | | | |{ |{ 15. |} | | | |{ |{ Large |} | | | |{ |{ phenocrysts |} |{ Not | | |{ |{ of pyroxene,|} |{ represented.| | |{ |{ over 2 mm. |} | | | |{ 8. |{ (_magn._) |} | | | |{ No plagioclase|{ | | | | |{ phenocrysts |{ 16. |} | | | |{ (_non-phen._) |{ Small |} | | | | |{ pyroxene |} |{ Not | | | |{ phenocrysts,|} |{ represented.| | | |{ under 2 mm.,|} | | | | |{ or none |} | | | | |{ (_parv._) | | | | | | | | | | | |{ 17. _Vitr._| ·02-·1 mm.| 2 | | |{ 9. _Phen._ |{ | | | | 5. |{ |{ 18. _Opac._| ·02-·1 mm.| 4 | | Prismatic |{ | | | | | (_prism._) |{ |{ 19. _Magn._| |{ Not | | |{ 10. |{ | |{ represented.| | |{ _Non-phen._ |{ 20. _Parv._|{ ·02-·1 mm.| 4 | | | | |{ ·1-·2 " | 2 | | | | | | | | 6. | |{ 21 } | | | | Ophitic | |{ 22 } | |{ Not | | (_oph._) | |{ 23 } | |{ represented.| | | |{ 24 } | | | +------------+---------------+-------------+-----------+--------------+

Observations of a Naturalist in the Pacific Between 1896 and 1899, Volume 1 — Part 218

THIRD ORDER OF THE HYPERSTHENE-AUGITE ANDESITES.

Observations of a Naturalist in the Pacific Between 1896 and 1899, Volume 1 — Part 218

CHARACTERS.—Felspars of the groundmass short and stout (orthophyric).

REMARKS.—The same classification is to be employed here as in the case of the two previous orders, but as the rocks in my collection that belong to this order are not numerous (nine sections), it will be sufficient to refer to the general remarks on the order on p. 290.

FOURTH ORDER OF THE HYPERSTHENE-AUGITE ANDESITES.