Across Brown Lowery Park are a parallel series of ridges and valleys running northwest to southeast created during the period of the Cretaceous Laramide Orogeny. This  mountain building event that produced our Rocky Mountains to the west between 150 and 50 million years ago was caused by the collision of continental plates being forced together further to the west. The Brown Lowery area is considered as being in the foothills region in front of the major mountain building.  The sediments in this location were deposited from approximately 94 to 72 million years ago. The ridges are of the more resistant Belly River Sandstone Formation and are younger than the less resistant valley sediments which are shales in the older Wapiabi Formation.  After the mountain building events a late period of glaciation helped to shape what we see today. In general the park is forest and vegetation covered and so geology has been extrapolated from outcrops exposed along trend.

Notes from Bob P