Lassen National Park Project By Jacob Bejune

Lassen Volcanic was established as a national park in 1916 because of its active volcanic landscape. Lassen Peak began erupting in All four types of volcanoes in the world are found in Lassen's 106,000 acres. By the early 1900s local sentiment was building for the protection of Lassen Peak and Cinder Cone against commercial development. In 1906 petitions from both Lassen and Plumas counties urged President Theodore Roosevelt to set aside the most significant features in the Lassen park are as national monuments. These recommendations eventually reached the desks of President Roosevelt, and on May 6, 1907, they were signed by the President. Lassen Peak and Cinder Cone became national monuments. While the Forest Service continued to manage the new sites, located within the Lassen National Forest, these two monuments formed the nucleus of the future park and gave recognition to Lassen Peak and Cinder Cone as striking examples of volcanic activity. On August 9,1916, the US Congress passed a bill establishing Lassen Volcanic National Park, and President Woodrow Wilson then signed it into law. Lassen National Park

How Lassen was Formed Lassen Peak began erupting in 1914, had the most significant activity in 1915, and had minor activity until All four types of volcanoes in the world are found in Lassen's 106,000 acres.

Types of Rock in Lassen All exposed rock is volcanic rock. Volcanic rocks are usually fine-grained or aphanitic to glass in texture. They often contain clasts of other rocks and phenocrysts.

Lassen’s Special Features Chaos Jumbles is a series of six plug Dome volcanoes formed by a rock fall avalanche. Manzanita Lake was formed when Manzanita Creek was dammed by avalanche debris. Reflection Lake and Lily Pond are depressions caused by steam explosions 300 years ago. Several groups of hot springs as a result of volcanic activity exist in the park. Volcanic eruptions formed Cinder Cone, Painted Dunes, and Butte Lake, and Snag Lake.

How is the Land at Lassen Changing? Land changes are due to erosion from snow, ice, and water. On average, Lassen receives 500 inches of snow per year. In the past, glaciation has played an important role in the park. Lassen Peak sits in the depression carved by the Lost Creek Glacier.

Environmental Issues Affecting Lassen Invasive species at Lassen include plants such as bull thistle, mullein, and invasive grasses. These plants crowd out native plants and compete for water. bull thistle

Technology in the Park Seismographs record earthquakes. There are 9 seismographs in the surrounding areas of the park. A Weather Station is located in Lake Helen. A weather station records temperatures, wind speed and direction, snow depth, and water content in the snow. This helps park rangers understand how ecosystems are affected by changes in weather patterns. GPS is used to track wildlife, create maps, and for looking for archaeological sites.

Pictures and Diagrams of Lassen

Map of Lassen National Park

Bibliography "Description4 of Lassen National Park." Letter to Jacob Bejune. 19 May MS. "Lassen Volcanic National Park (U.S. National Park Service)." U.S. National Park Service - Experience Your America. Web. 28 May Supplemental Park Information. Raw data.