PREHISTORIC LAKE COUNTY

<p>Most of Lake County's rocks were created during the <strong>Silurian Period</strong>, around 420 million years ago. They formed as the mud of an ancient sea bottom slowly built up over time. In this sea, corals grew, bug-like trilobites scampered about, and sea scorpions swam overhead. Every once in a while, the skeletons of these creatures were buried in the mud. Over time, the skeletons turned to stone and became fossils. Fossils are the clues that scientists use to understand the past. Look closely at the fossils here, you're looking at the ancient residents of Lake County.</p>