Final answer:
Chimney Rock is an iconic landmark located in the panhandle of Nebraska, serving as a historical marker for 19th-century pioneers and composed of volcanic ash and Brule clay from the Oligocene Age.
Step-by-step explanation:
The state's panhandle that has Chimney Rock is Nebraska. Chimney Rock is an iconic landmark and rock formation located in the panhandle of Nebraska, specifically in Morrill County.
It served as a navigational aid and landmark for pioneers traveling westward on the Oregon Trail, California Trail, and Mormon Trail in the 19th century.
The rock stands approximately 300 feet above the surrounding plains and is composed of layers of volcanic ash and Brule clay dating back to the Oligocene Age, approximately 34 million years ago.