Y Mountain
![above Y.jpeg](https://brightspotcdn.byu.edu/dims4/default/1220ffc/2147483647/strip/true/crop/450x514+0+0/resize/450x514!/quality/90/?url=https%3A%2F%2Fbrigham-young-brightspot.s3.amazonaws.com%2Fb7%2Fd9%2F9229d95847f3a905cec150884f68%2Fabove-y.jpeg)
This aerial photo of Y Mountain, which creates the south wall of Rock Canyon, shows the thick cliff-forming limestones, at the upper third of the peak, formed in shallow seas during the Mississippian Period.
This aerial photo of Y Mountain, which creates the south wall of Rock Canyon, shows the thick cliff-forming limestones, at the upper third of the peak, formed in shallow seas during the Mississippian Period.