2017 Map of Tyonek C-7 SE

About this map

Glacial ice dominates the high-altitude landscape of this Matanuska-Susitna region, where several major ice fields converge. The upper reaches of Hayes Glacier descend from the northwest, while the vast Trimble Glacier carves through the central portion of the quadrangle. To the south, the massive Triumvirate Glacier flows across the terrain, illustrating the dramatic cryospheric processes active in this part of Alaska. This 2017 survey by the U.S. Geological Survey provides a detailed record of the glacial extent and topographic relief across townships including t17n r17w and t18n r17w. The map serves as a critical baseline for understanding the shifting margins of these alpine ice bodies in the early 21st century.