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Filtering by: Creator Brown, Lawrence L. Subject Mines and mineral resources -- Oregon

A description of some Oregon rocks and minerals

Creator:

Oregon State University. Extension Service, Dole, Hollis M. (Hollis Mathews), and Brown, Lawrence L.

Abstract:

Rocks are defined as aggregates or mixtures of minerals; rocks also include noncrystalline materials such as the natural glasses, and organic material such as coal. Rocks are found ready-made in nature. They are not homogeneous nor are they crystalline, although they may be made up of crystalline material. The composition...

Resource Type:

Learning Object