Mount Lebanon is a mountain summit in Liberty County, Montana, United States.
Description
Mount Lebanon is part of the Sweet Grass Hills and ranks as the fifth-highest peak in the range, and fifth-highest in the county. It is situated north of Chester, Montana, and south of the Canada–United States border. Precipitation runoff from the mountain drains into tributaries of the Milk River. Topographic relief is modest as the summit rises over above the surrounding plains in one mile. The landform's toponym has been officially adopted by the United States Board on Geographic Names.
Geology Mount Lebanon is an exposed laccolith composed of diorite porphyry which was created by an igneous intrusion through older Cretaceous sedimentary rocks during the Eocene, about 50 million years ago.Sweet Grass Hills, blm.gov, Retrieved 2023-07-23. Over time, erosion of the sedimentary rock has exposed the solidified laccolith which is more resistant to weathering.
Climate Based on the Köppen climate classification, Mount Lebanon is located in a semi-arid climate zone with long, cold, dry winters and hot summers with cool nights.Sweet Grass Hills Resource(s) Management Plan (RMP) Amendment and West HiLine Resource(s) Management Plan (RMP), Toole County, Liberty County: Environmental Impact Statement, 1996, p. 19, 20. Winter temperatures can drop below −10 °F with wind chill factors below −30 °F.
See also List of mountains in Liberty County, Montana
References