| 21. | These consist of alkali-feldspar porphyritic quartz-trachyte and trachyte.
|
| 22. | A similar phenomenon takes place also in selective alteration of alkaline feldspar.
|
| 23. | Because of this phenomenon, physical disintegration of alkaline feldspar takes place.
|
| 24. | In the batholiths there are quartz-feldspar porphyry and dolerite dykes.
|
| 25. | These pale rocks are rich in feldspar and may contain some quartz.
|
| 26. | There is less feldspar and more calcite than the adjacent Bringelly Shale.
|
| 27. | Less quartz content would lead to " quartz alkali feldspar syenite ".
|
| 28. | Other rocks includes clinopyroxene, titanite, apatite and feldspar.
|
| 29. | These include the amphibole, biotite, feldspar and zircon.
|
| 30. | This sediment, composed of quartz, mica and feldspar, became brownstone.
|
