What type of material is ejected from a shield volcano?

lava
A shield volcano is a type of volcano named for its low profile, resembling a warrior’s shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano.

What is Shield cone?

Definition of shield cone : a conical or domical shield volcano.

What is a composite cone?

Composite cones. Composite cones are some of the most easily recognizable and imposing volcanic mountains, with sloping peaks rising several thousand meters above the landscape. Also known as stratocones, composite cones are made up of layers of lava, volcanic ash, and fragmented rocks.

How do composite shield and cinder cone volcanoes differ?

Composite volcanoes are tall, steep cones that produce explosive eruptions. Shield volcanoes form very large, gently sloped mounds from effusive eruptions. Cinder cones are the smallest volcanoes and result from accumulation of many small fragments of ejected material.

How are shield volcanoes made?

Shield volcanoes are formed by lava flows of low viscosity – lava that flows easily. Consequently, a volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano.

How do you make a shield volcano?

Construction of a model of a shield follows the same basic steps as the model for stratovolcanoes.

1. The Base. The piece of cardboard will be the base of the volcano. Tape a film canister near the center.
2. The Interior. The interior of your volcano will be made of newspaper wrapped in tape. Make balls from the newspaper.

What materials make up composite volcanoes?

Composite volcanoes—also called stratovolcanoes—are named for their composition. These volcanoes are built from layers, or strata, of pyroclastic material, including lava, pumice, volcanic ash, and tephra. The layers stack on each other with each eruption.

What are the characteristics of shield volcanoes?

Shield volcanoes have the following characteristics:

• Basaltic magma, which is high in temperature, very low on silica and with low gas content.
• Basic lava, which is non-acidic and very runny.
• Gentle sides as the lava flows for long distances before it solidifies.
• No layers, as the volcano just consists of lava.

How is shield cone formed?

Shield cones form from hot, runny lava that is erupted from the the volcano through its summit and the many side vents and fissures throughout the volcano’s flanks (Sides). Shield cones are low, very broad, and gently sloping volcanoes.

What are the materials to make a volcano?

Let’s build a volcano!

• Aluminum cookie sheet.
• Cardboard box.
• Lots of old newspaper.
• Measuring spoon and measuring cup.
• Modeling clay (flour, salt, water)
• Funnel.
• Small plastic bottle (like a small pop bottle)
• Baking soda (about 3-4 tablespoons)

How is a shield volcano formed?

Shield volcanoes form when a centralized vent produces low-viscosity flows over a long period of time (Walker, 2000). Most commonly they comprise basaltic lavas, but higher silica peralkaline lavas may also be present (Fig. 38).