The upper part of the Crooked River Gorge are made of columnar basalt cliffs eroded by the Crooked River since the Newberry volcanic eruption 1.2 million years ago .
The Crooked River Gorge are also popular among climbers .
The upper part of the Crooked River Gorge , which are also popular among climbers , are made of columnar basalt cliffs eroded by the Crooked River since the Newberry volcanic eruption 1.2 million years ago .