4 types of volcanoes Flashcards Preview

Geography > 4 types of volcanoes > Flashcards

Flashcards in 4 types of volcanoes Deck (11):
1

What is a cinder cone?

small 1500 feet, usually a one-time eruption, can be associated with other cones in the area (cinder cone field)

2

What are cinder cones composed of?

Pyroclasts (cinders) usually no associated lava flow

3

what are examples of cinder cones?

Sierras Nevada's (Eastern Sierras), Road to Vegas, HWY. 295

4

What are shield volcanos?

Gentle eruption, broader, not tall, round, over 100 miles, -30000 feet in the ocean.

5

Shield volcanos usually occur where and what's an example of some?

Usually occurs on the ocean floor and in Hawaii

6

What are strato volcanos otherwise known as composite volcanos?

Volcanos known to have violent and explosive eruptions and are steep sided and tall volcanoes.

7

What are strato volcanos composed of?

Composed of alternating layers of volcanic ask deposits and lava flow.

8

What are examples of strato volcanos?

Andes, Cascades > Mt. Shasta, Mt. St. Helens, Mt. Rainier, Crater Lake.

9

What are Rhyolite Plug Domes?

Usually a one-time eruption and a 2-stage process

10

What are the two stages of a Rhyolite Plug Dome?

1st stage: cinder cone made of pumice which is the gases mixed with rhyolite and silica. The build-up causes the 2nd stage: plug of obsidian which is volcanic glass that covers the top of the volcano cause a dome to form.

11

What's a mono crater and an example of one?

A rhyolite plug dome field; the smallest one if called a panum crater