"The Mystery of Lyle and Louise"

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

Pale pink felsite, with small sanidine phenocrysts.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Light gray, fine small clasts.

Gray to brown mudstone with abundant silt.

Red-brown to gray, coarse-grained, containing feldspar and mica.

Dark gray with abundant gas pocket vesicles.

Silvery, paragranite and muscovite-rich with medium garnet crystals.

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

Gray to buff, with numerous ooliths and fossil fragments.

Dense and massive.

Gray to white, coarse crystalline, carbonate rock.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Fightly cemented, medium-to-coarse quartz grains.

Hematite-cemented quartz; orthoquartzite.

Typical green-gray, fissile, clay-rich.