Figure 14 Micrograph of fired hornblende grains. The grains show incipient transformation into oxyhornblende, that can be recognised by the brownish colour of the rims and cleavage planes.
Plane polarised light, width of field = 700 µm
Figure 14 Micrograph of fired hornblende grains. The grains show incipient transformation into oxyhornblende, that can be recognised by the brownish colour of the rims and cleavage planes.
Plane polarised light, width of field = 700 µm