Geologists call Mount St. Helens a composite volcano (or stratovolcano), a term for steep-sided, often symmetrical cones constructed of alternating layers of lava flows, ash, and other volcanic debris.

Mount St. Helens takes its English name from that of the British diplomat Alleyne FitzHerbert, 1st Baron St Helens, a friend of explorer George Vancouver who surveyed the area in the late 18th century. [1] …

Mount Saint Helens is a composite cone volcano known for its steep slopes and explosive eruptions. This type of volcano is formed from alternating layers of lava and ash, typically found at convergent …

Study with Quizlet and memorize flashcards containing terms like Mount St. Helens is..., Which one of the following shows the correct order (left to right) of decreasing magma viscosity?, Which of the …

What type of volcano is Mt. St. Helens? Mt. St. Helens is a stratovolcano, also known as a composite volcano. These types of volcanoes are characterized by their steep, conical shape and are built up …

Nov 26, 2025 · Mount Saint Helens, volcanic peak in the Cascade Range, southwestern Washington, U.S. Its eruption on May 18, 1980, was one of the greatest volcanic explosions ever recorded in …

Notable Statistic: The May 18, 1980 blast devastated 596 square kilometers (229 square miles) and destroyed timber valued at several million dollars. This was the deadliest and most economically …

Nov 16, 2022 · Mount St. Helens is an example of a composite or stratovolcano. These are explosive volcanoes that are generally steep-sided, symmetrical cones built up by the accumulation of debris …

Is Mount St. Helens a shield volcano? Geologists call Mount St. Helens a composite volcano (or stratovolcano), a term for steep-sided, often symmetrical cones constructed of alternating layers of …

Mount St. Helens is a stratovolcano, a steep-sided volcano located in the Pacific Northwest region of the United States in the state of Washington.