Ozark streams typically occupy narrow, steep-sided valleys and often amount to a series of short pools connected by well-defined riffles .

Ozark streams typically occupy narrow, steep-sided valleys and often amount to a series of short pools connected by well-defined riffles.

Chert gravel is often at the bottom of the stream bed.

Chert gravel is often at the bottom of the stream bed.

Ozark streams are typically clear and relatively cool, often because they are fed by springs .

Ozark streams are typically clear and relatively cool, often because they are fed by springs.

Their karst topography, formed from the dissolution of soluble rocks such as limestone, is characterized by underground drainage systems with sink holes and caves .

Their karst topography, formed from the dissolution of soluble rocks such as limestone, is characterized by underground drainage systems with sink holes and caves.

Their clear, cool, hard waters have gravel bottom riffles, pools,runs and gravel bars .

Their clear, cool, hard waters have gravel bottom riffles, pools,runs and gravel bars.

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Ozark streams typically occupy narrow, steep-sided valleys and often amount to a series of short pools connected by well-defined riffles .
Chert gravel is often at the bottom of the stream bed.
Ozark streams are typically clear and relatively cool, often because they are fed by springs .
Their karst topography, formed from the dissolution of soluble rocks such as limestone, is characterized by underground drainage systems with sink holes and caves .
Their clear, cool, hard waters have gravel bottom riffles, pools,runs and gravel bars .