"Ward's Phenomena Lab Activities"

Shows porphyritic texture in a fine dark matrix abundant large feldspar phenocrysts. Hand specimen.

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.

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.

Classic, very coarse-grained igneous texture.

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

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

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