|
|
|
New Titles:
No. Amer Seashells
|
Intro to Fossils |
Intro to Rocks |
Minerals |
|
 |
E104 Introduction to Rocks
The Earth is made of rocks and this poster provides a comprehensive
overview of what they are and how they are formed. It begins by
explaining that rocks are made of minerals and that each type of
rock is the result of a specific mixture of minerals subjected to a
clearly defined geological process.
The bulk of the poster is divided into three sections, one for each
type of rock: igneous, sedimentary and metamorphic. An illustration
shows how they are made. It is followed by photographs of a dozen
representational specimens. A dramatic photograph shows a natural
formation. A bonus section shows and explains some of the more
specialized and popular rock forms such as geodes, concretions,
agates and thunder balls. This is a great poster for earth science
classes, but one also appreciated by rock collectors as it is a
helpful resource for identification. |
|
