Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Example of stained rock slab and resulting scanned image. A Stained rock slab, with alkali feldspar stained in yellow and plagioclase in pink; quartz is not stained and appears grey; mafic minerals are also not stained and appear black in the image. B Binary image showing the distribution of alkali feldspar in black. Crystal size distribution is calculated using properties of the alkali feldspar crystals obtained from the binary image. The sample is 20 cm long
