Earth Science 11 Mount St. Helens Video #2 Worksheet printable pdf download

Earth Science 11 Mount St. Helens Video #2 Worksheet

Earth Science 11

Mount St. Helens Video #2

Name:_______________

(Evidence for a global flood?)

Intro:

1. At what day and year did Mount Saint Helens erupt?

2. Approximately how tall was the volcano before the eruption?

3. Approximately how much of the summit was lost after the eruption?

4. A large portion of the debris flow from the volcano entered Spirit Lake and caused a

water wave __________ feet high.

5. How many people died from the eruption?

6. How much energy was equivalent to the eruption on May 18

Part 1: Rapid Strata Layers

Dr. Austin talks about the strata layers that are seen at Mt. St. Helens. He describes the

layers occurred from:

a. Air fall deposits from May 18, 1980 that fell down as the eruption quieted down

b. Then a 25 ft layer of pyroclastic flow from June 12, 1980

c. Then above that, a mud flow deposit from March 19, 1982

7. The layered strata from the pyroclastic flow deposit of June 12, 1980 is said to have

formed in 3 hrs. There are thin layers of coarse and fine particles. What does this tell us

about particles moving at 100mph speeds?

Part 2: Rapid Erosion

8. From the May 18

eruption, there was a large debris dam that blocked the tootle river.

Then on March 19, 1982, the dam gave way and caused the Tootle Canyon, nicknamed,

the Little Grand Canyon (1/40

scale model). How fast was the canyon created from

erosion?

Matty 2014

Earth Science 11 Mount St. Helens Video #2 Worksheet