"The Mystery of Lyle and Louise"

Gray, fine-grained, massive contact rock.

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Chlorite-mica with perfect slaty cleavage.

Gray to white, coarse crystalline, carbonate rock.

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

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

Dark, waxy, bitumin-rich.

Fine crystalline, pure calcite.

Typical green-gray, fissile, clay-rich.

White, very dark green, and very dark red to light red granoblastic intergrowth of wollastonite, diopside, and andradite.