12-01-2017, 01:26 PM
I am pretty sure the cinder is from here:
19°41'46.8"N 155°29'44.4"W
and was taken from deep enough so as not to be contaminated with surface materials, dried and sifted to exclude all but finer grains.
19°41'46.8"N 155°29'44.4"W
and was taken from deep enough so as not to be contaminated with surface materials, dried and sifted to exclude all but finer grains.