What you can learn about history by looking down

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[September 16, 2016]   LINCOLN - Every day in the spring, Mandy Cordray searches local farmer's fields. What is she looking for? Rocks and fossils that help tell the history of Logan County.

In 2001, Cordray found her first arrowhead when they dug up a garden at her new house. After finding this artifact, Cordray soon became interested in looking for more.

Cordray searches lead her around Logan County usually in areas close to Sugar Creek. She is amazed by all she finds and says you just have to know where to look.

Many people stop and talk to her when she is walking and have stories about finding their own rocks. Near the fields, Cordray finds many rocks. Cordray said she will go out to look for a few rocks, and be out there for hours.

Farmers have invited her to go through their fields that are full of rocks. Since rocks ruin blades, the farmers are glad she helps clear them out. Corday said no farmer has ever turned her down when she asks to look for rocks in their fields.

Cordray said right off old Route 121, a ferry used to travel down Sugar Creek in the county's early days, so she has found several rocks there.

Cordray has found several rocks and fossils right off Lazy Row near Atlanta. Cordray said when she walks these fields north towards Bloomington, she is going where Abraham Lincoln rode his horse.

Many fossils can also be found near the railroads.

She even found an arrowhead by Ayerco gas station.

Cordray is on the fourth layer of digging just on her landscape and has 700 feet of five-foot-wide rock.

The various rocks and fossils help show the history of the area.

Cordray has found broken up pieces of Trilobites, which were sea creatures from years ago and are very valuable.

Cordray has also found arrowheads, spears, axes, art rocks, and pottery. The pottery helps date the area it is found in.

After cleaning the rocks with a brush, Cordray sometimes discovers the gems underneath such as amethysts and rubies.

She has found Petoski stone native to Lake Michigan. When glaciers moved through the area, they left behind many types of stones.




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At least four tribes lived in this area, so she finds fossils from thousands of years ago. In her backyard, she has found where the Indians used to have teepees. Has found Crinoid Stems and Thibes that date back almost 12,000 years. These rocks and fossils tell stories of the period they are from.

She has found quartz near railroad tracks. Their "natural electricity" is why they are used in quartz watches.

Coal is another rock she finds.

She lets kids take a sandstone rock and use it on a gourd.

Cordray has learned many ways rocks have been used over the years. For instance, since rocks maintain heat, they were used around the coals when cooking. Limestone in the ground was used to help refrigerate food years ago. Rock salt was left behind by the movement of oceans and people learned to preserve meat by using these salts.

To learn more about what she finds, Cordray starts out by Googling the rock. She also has a book on identifying and understanding artifacts and several rock and fossil books, and goes to gem and mineral shows.

Cordray said Dr. Dennis Campbell out at Lincoln College's Creekside Environmental Center has been an invaluable resource for her. Cordray said the Illinois Association for the Advancement of Archeology is another good resource.

Cordray said she likes to donate rocks and fossils to schools to help kids learn about the past. She has a beginner's fossil kit for kids who are interested in learning more and tells them to wear safety glasses when digging or opening geodes.

Cordray said she has given geodes and fossils to classes, and kids are excited about the rocks. It can lead them to learn more about science and history and the make up of minerals.

 

Cordray set up a display at the Creekside Environmental Center for Earth Day to help children learn more about taking care of the earth and about local archeology.

Cordray displays her collection at the Railsplitter Festival to help people learn about the history of Logan County from the recent past all the way back to the Cambrian Age. Through the rocks and fossils, people can learn about the tribes who lived in the area.

Cordray will be at this year's Railsplitter Festival September 17 and is excited to continue sharing with others what rocks and fossils have taught her about Logan County's history.

[Angela Reiners]

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