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

Pale pink felsite, with small sanidine phenocrysts.

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

Gray, fine to medium-grained “Berea grit”.

Dark, waxy, bitumin-rich.

Brownish gray, kerogen-rich; commercial oil source.

Light gray, earthy.

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

Gray andesite with phenocrysts of felspar and/or hornblende.

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.