About 300 million yrs back One more oscillating sea coated the area abandoning layers of shale and limestone. Then, about 1,000,000 yrs ago, glaciers moved down with the north. The Kaw River roughly parallels the southernmost idea of the most recent glacier, which protected almost all of North America about https://kawsrocksweed18493.qowap.com/89051735/the-basic-principles-of-kaws-rocks