"The Mystery of Lyle and Louise"

White and black bands of quartz, feldspar, and biotite; typical foliation.

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.

Gray to brown mudstone with abundant silt.

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

Massive, chlorite-rich.

Fightly cemented, medium-to-coarse quartz grains.

Black, soft; most widely mined.

Slaty cleavage; contains hematite.

Gray, fine-grained, massive contact rock.