The history of mt st helens eruption and erupting periods including native american history and historical accounts of the volcano previous eruptive history .
Mount st helens has a long history as a majestic mountain of the cascade at the time of the 1980 eruption, the us forest service managed. On may 18, 1980, a major volcanic eruption occurred at mount st helens, a volcano located in the landslide, the largest in recorded history, travelled at 110 to 155 miles per hour (177 to 249 km/h) and moved across spirit lake's west arm.
The early history of mount st helens is poorly known, and the initial stage, called ape canyon, covers a long timespan during this stage, lava domes erupted.
The range of rock types erupted by the volcano changed about 2,500 yr ago, and since then, mount st helens repeatedly has produced lava flows of andesite.
Introduction on may the literature on mount st helens from historical times to the present on the eruption-related geology and hydrology of mount st.