18. The violent eruptions from inside the earth that caused great mountain chains to form about 300 million years ago created the following landform(s) in Oklahoma: a. Ouachita, Arbuckle, and Wichita mountains s. reservoirs and dams c trees

The Ouachita Mountains, which stretch into Oklahoma, were formed as a result of tectonic plate collisions and violent volcanic activity that began over 300 million years ago. These geological forces pushed rock layers upward, creating the impressive mountain chains we see today. The intricate layering of sedimentary rocks in these mountains offers a breathtaking view of the planet’s history, showcasing ancient environments that existed long before humans walked the Earth. Additionally, the Arbuckle Mountains, one of the oldest mountain ranges in the United States, also contribute to Oklahoma's dramatic landscape. Formed from ancient limestone, these mountains are a true geological treasure, offering plenty of opportunities for hiking, wildlife spotting, and exploring the unique ecosystems that thrive on their slopes. They serve as a reminder of the breathtaking power of nature and its ability to shape the land over millions of years!