"Ward's Phenomena"

Gray to tan clastic rock made of silt sized particles.

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

Light gray, fine small clasts.

Buff, coarse, crystalline “Austin Marble” with shell casts and molds.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

White, mature, friable.

Red clastic rock composed of sand sized particles and hematite.

Sale

Green shale which contains approximately 85% Illite. Impurities may include other clay minerals, such as micas and feldspars.

Useful for weathering and erosion, soil formation, porosity and permeability, or other general earth science labs.