"The Mystery of Lyle and Louise"

1 pound of black sand packaged in a heat-sealed bag.

Pink and gray bands, with biotite; shows good foliation.

These fascinating frogs are uniquely adapted for climbing, with prominent adhesive pads on the ends of their digits.

The nocturnal hermit crab uses “borrowed” shells to protect its relatively soft body, changing shells as it grows larger.

Massive, chlorite-rich.

Gray to brown mudstone with abundant silt.

Fightly cemented, medium-to-coarse quartz grains.

Black, soft; most widely mined.

Slaty cleavage; contains hematite.

Spinel group; black, dull metallic luster; common iron oxide.