"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

Gray to brown mudstone with abundant silt.

Gray, fine-grained, massive contact rock.

Coarse-grained plagioclase and pyroxene with some olivine.

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

Classic, very coarse-grained igneous texture.

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

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.

Pink/gray coarse carbonate rock.

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