"The Mystery of Lyle and Louise"

Dehydrated Preserved

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

Formalin Preserved

Gray to brown mudstone with abundant silt.

Fightly cemented, medium-to-coarse quartz grains.

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

Utah

Gray to buff, with numerous ooliths and fossil fragments.

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

Light gray, fine small clasts.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.

Chlorite-bearing.

Pale pink felsite, with small sanidine phenocrysts.

Typical green-gray, fissile, clay-rich.