page_title: Hagan Mountain
section_title: Geology
hierarchical_section_title: Hagan Mountain / Geology
caption_attribution_description: English: Cascades panorama from the upper meadow below Park Butte. To left is northern Picket Range. Mt. Blum and Hagan Mountain to right side.
context_page_description: Hagan Mountain is a 7,080-foot multi-peak mountain located in the North Cascades, in Whatcom County of Washington state. It is situated 12 mi north of Marblemount, within North Cascades National Park. Its nearest higher peak is Mount Blum, 1.81 mi to the north, with Bacon Peak 4.45 mi to the south. Precipitation runoff and glacier meltwater from the large Hagan Glacier and smaller Hidden Creek Glacier on the mountain drains into tributaries of the Skagit River.
context_section_description: The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks, ridges, and deep glacial valleys. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences.
  The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch. With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted. In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.
  During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured and shaped the landscape. The "U"-shaped cross section of the river valleys are a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.
caption: Northern Pickets, Mount Blum, and Hagan (right) from the upper meadow below Park Butte
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