[Slickensides]
These are striations that are produced when [rock] surfaces move past each other while being fractured. [Slickensides] may superficially resemble certain of the [Pennsylvanian] coal plants of Texas.
Since [slickensides] are commonly at an angle to the bedding plane and plant remains lie parallel to the bedding plane, the two are usually easily distinguished.
Concretions
Many shales and sandstones contain hardened masses of minerals and [rock] that are often mistaken for fossils. These masses, called concretions, are usually found weathered out of the surrounding rock and may assume the shape of bones, flowers, vegetables, turtles, etc. Although these concretions do not represent organic remains, it is sometimes possible to find true fossils inside them.
WHERE AND HOW TO COLLECT FOSSILS
In [fossil] collecting, as in most “collecting” hobbies, the key to success lies in knowing where to look, what equipment to use, and the most effective methods of collecting.
COLLECTING EQUIPMENT
[Fossil] collecting is a relatively inexpensive hobby because it requires a minimum of supplies and equipment. However, as in almost any hobby, there are certain basic items of equipment that must be acquired.