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Page 1: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica
Page 2: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

What is a Volcano?

• Definition• Lava• Magma 1. Low-silica 2. High-silica

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Page 3: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Volcanic Eruptions• Quiet eruption 1. Low gas 2. Lava flows

Page 4: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Volcanic Eruptions (cont.)• Explosive eruption 1. High gas 2. Tephra 3. Particle size

Page 5: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Types of Volcanoes• Shield volcanoes 1. Low-silica 2. Lava flows 3. Description

Page 6: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Types of Volcanoes (cont.)• Cinder cone volcanoes 1. Low-silica/high gas 2. Fire fountains 3. Tephra 4. Description

Page 7: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Types of Volcanoes (cont.)• Composite volcanoes 1. High-silica 2. Lava flows/tephra 3. Description

Page 8: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica
Page 9: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Volcano Locations• Divergent boundaries 1. Rifts 2. Low-silica 3. Mid-ocean ridge

Surtsey

Page 10: What is a Volcano? Definition Lava Magma 1. Low-silica 2. High-silica

Volcano Locations (cont.)• Convergent boundaries 1. Subduction zones 2. High-silica 3. Ring of Fire


Volcanoes. Lava Lava: Molten rock outside the earth Magma: Molten rock inside the earth Types of Lava – Aa Rough and Stone Like Looks like angular rocks

Volcanoes Chapter 6. Eruptions Volcano – (#34) opening in Earth’s surface which allows gas & magma to escape –Magma: (#35) molten rock underground –Lava:

REQUIRED ROCKS & FAMOUS ROCK FORMATIONS. IGNEOUS ROCKS Formed when magma or lava cools & crystallizes INTRUSIVE (Plutonic): magma cools underground

Rocks. Igneous Rock Origin: Magma from within the Earth cools to form igneous rock. Extrusive: Magma that reaches the surface, becomes lava and cools

What is the difference between LAVA and MAGMA?. LAVA is liquid rock on the outside of a volcano, and MAGMA is liquid rock inside a volcano

Volcanoes & Tectonics Seamounts and Guyots. Lava Viscosity (silica, Temp.) & explosiveness Basaltic lava - less silica and higher temperature, low viscosity,

Volcanic Activity. Silica Earth’s crust and mantle are mostly made of silica The more silica in the magma, the thicker it is

Volcanoes - Garske's 4th Dimension - Homegarskes4thdimension.weebly.com/.../copy_of_volcanoes.pdfLava Once magma gets to the surface, it changes its name to lava It’s the lava that

Volcanoes. 7.2 Volcanic Eruptions Types of Lava Mafic Lava: rich in magnesium and iron – Forms much of the oceanic crust Felsic Lava: rich in silica (less

Igneous Rocks. Igneous rocks Form from “magma” (molten rock) “Lava” is magma that reaches the surface and looses gas (mostly water and CO 2 ) Magma that

CHAPTER 4 IGNEOUS ROCKS. Magma: The parent material of igneous rock Lava Extrusive – volcanic Intrusive – plutonic Nature of magma Melt Volatiles From

Ch 3 Review Volcanoes & Extrusives. What’s the difference between magma and lava?

Hawaii Kilauea Low viscosity lava - Western Oregon University › ~brownk › ES104 › ES104.2008.1117.Volcanoes.9.pdf · 1 VOLCANOES Tectonics of Magma • Basaltic magma – From

Formation of Magma and Igneous Rocks Basalt lava flow - Hawaii

Topic: Igneous Rocks. Igneous Rocks - Lava – Lava – Magma – Magma –

VOLCANOES. Pompeii, Italy Bodies… Terms to know… ► Magma- liquid rock ► Lava- magma that breaks through to the surface of the earth ► Vent- opening

18.2 - Eruptions. Making Magma Activity depends on ____________ of magma Lava can be thin & __________ or ___________ & lumpy

Volcanoes. Volcano Magma -weak spot in crust where magma comes up -molten mixture of rock-forming substance, gases, water from the mantle -called lava

IGNEOUS ROCKS form when magma/lava cools and solidifies

Classification based upon formation. Igneous rocks form from molten lava. What’s the difference between magma and lava? The formation of igneous rocks

Igneous Rocks. Formed from the cooling of lava or magma

1. Magma and Solutions 2. Lava and water 3. Lava and magma 4. Solutions and Saltrations

Erosion Geology Fossils. Igneous Rock Magma Lava

A Method for Magma Viscosity Assessment by Lava Dome

VOLCANOES!. Factors Affecting Eruptions Magma temperature Hotter flows easier… Magma viscosity – determined by temp and composition. High silica = high

Three Types of Volcanoes. Shield Volcanoes Low silica level Low silica level Low viscosity Lava-thinner Low viscosity Lava-thinner High or low levels

Volcanoes. 1.This magma is slow moving and causes violent eruptions. 2.This lava is formed from mafic magma & is smooth. 3.This lava is formed from felsic

VOLCANOES. Lava & Magma Lava vs. Magma…What’s the difference? Lava- magma that flows into Earth’s surface; the rock that forms when magma cools & solidifies

VOLCANOES. VOCABULARY Minerals – An inorganic solid with a specific chemical composition Magma – Liquid or molten rock under ground Lava – Magma that

VOLCANISM & Igneous Activity. VOLCANISM Lava = Magma at earth surface –Silica content controls “explosiveness” Pyroclasts = Fragments of rock due

Rocks 3.1. The Rock Cycle Igneous Rocks Form from the solidification of melted minerals (magma or lava). – Magma = melted rock underground – Lava =

Intrusive or plutonic magma crystallizes at depth in the Earth: Granite Volcanic or extrusive: magma crystallizes on the surface of the Earth: Lava

Bowen’s Reaction Series Construct a concept map using the following terms: basaltic magma rhyolitic/granitic magma igneous rocks basaltic lava andesitic

Created by the solidification (crystallization) of magma or lava

(volcano) (Volcan) Volcano (magma) (lava) d L6du m (shield