Aegirine-augite from California, USA
USA | |
| USGS Bulletin 2160 |
| Huebner, J. S., Flohr, M. J., & Grossman, J. N. (1992). Chemical fluxes and origin of a manganese carbonate-oxide-silicate deposit in bedded chert. Chemical Geology, 100(1-2), 93-118. |
USA | |
| USGS Bulletin 2160 |
| Huebner, J. S., Flohr, M. J., & Grossman, J. N. (1992). Chemical fluxes and origin of a manganese carbonate-oxide-silicate deposit in bedded chert. Chemical Geology, 100(1-2), 93-118. |