I may be wrong about this, but here are five sediment samples from two different sites near where I live.

From left to right, the first three are samples I collected years ago near the Toquerville mine. I believe they are: 1. volcanic basalt and alluvial gravel wash, 2. quaternary eolian quartz sand, and 3. mineralized sandstone tailings.

The last two samples on the right are what I collected yesterday. They appear to be Moenkopi that’s been chemically altered by runoff or chemical exposure and unoxidized Meonkopi unearthed during construction.

Images: Small glass vials of each sample with cork stoppers sitting in an Oliva cigar box. The colors include lavender, coral, burnt orange, tan, and maroon.