"Ward's Phenomena"

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

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

Coarse-grained plagioclase and pyroxene with some olivine.

Dark-green 'verde antique', containing some chlorite and calcite.

Gray, fine-grained, massive contact rock.

Gray to brown mudstone with abundant silt.

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

Fine, common limestone; massive, and will fizzle with HCl.

Pale pink felsite, with small sanidine phenocrysts.

Coarse-grained, with microcline, biotite and horblende phenocrysts.