Anorthite from Philippine Sea Plate
Japan | |
| [var. Labradorite] Kato, T. (1924) Japanese Journal of Geology and Geography, 3, #2, 59-70. |
| Alfredo Petrov - field observations, 4-2014 |
PXRD by John Attard, May 2014, on samples collected by Alfredo Petrov. | |
| photo in: Koubutsu Doshikai (2017) Kanto-to Shuhen-no Koubutsu (279pp). |
| Petrov, Alfredo (n.d.) Personal Communication. |
Sanpo beach, Aogashima, Hachijō Subprefecture, Tokyo Metropolis, Japan