Rocks, Rocks and More Rocks!

Rocks, Rocks and More Rocks!

Rocks, Rocks and More Rocks! Igneous FIRE ROCKS (for now) Extrusive Igneous Rocks Notes: Extrusive Igneous Rocks

form when lava erupts from a volcano or bubbles up from tectonic plates moving apart - onto Earths surface. Ex: Basalt the most common extrusive rock on Earth; forms most of Earths ocean floor. Ex: Obsidian black volcanic glass

Earth's Most Abundant Bedrock: Basalt Basalt forms more of Earth's surface than any other rock type. Most areas in ocean basins are basalt. May be on land from lava flows, too.

Igneous Rocks Igneous Rock - Obsidian Obsidian was used to make knives, arrow heads, spear points, scrapers and

many other weapons and tools How igneous rocks form Extrusive When a volcano erupts or

when magma bubbles to the surface Intrusive when magma cools slowly inside

earth Intrusive Igneous Rocks Notes: forms when magma hardens beneath Earths surface (INSIDE). Ex: Granite the most abundant intrusive rock on Earths continents.

Forms the core of many mountain ranges. Ex: Porphyry- looks like jello w/fruit inside it Intrusive Igneous Rocks Granite is used to make many objects

Granite is also well-known from its many worldfamous natural exposures. These include: Stone Mountain, GA; Mount Rushmore, SD

Intrusive Igneous Rock Porphyry Igneous Rocks Notes: Texture fine grained Rapidly cooling lava forms a finegrained rock with small crystals. Ex: Basalt - crystals too small to be seen without a microscope.

Ex: Obsidian smooth, shiny texture like thick glass & cooled without forming crystals Volcanic Glass Igneous Rocks Obsidian Obsidian on the side of a volcano

Igneous Rocks Notes: Texture: coarse-grained Slowly cooling magma forms coarsegrained rock with large crystals Ex: granite and porphyry Igneous Rocks Mineral Composition

Notes: When magma is high in silica lightcolored rocks form - like granite. When lava is low in silica darkcolored rocks form - like basalt High Silica vs. Low Silica Uses of Igneous Rock Notes: Granite

Statues, Bridges and old public buildings, Paving streets with cobblestone, floors, kitchen countertops (thin polished sheets of Granite) Uses of Igneous Rock Basalt

- Gravel for construction Obsidian - Sharp tools for cutting and scraping (Native Am!), Starting vegetable gardens (fertilizer) its called Perlite, which is formed from heating Obsidian

Pumice is cool! It can float! Pumice polishing used for cleaning and Uses of Igneous Rock Statues,

Public Buildings - Granite Uses of Igneous Rocks Cobblestone streets, kitchen countertops Granite Questions

What processes form Igneous Rocks? How are the 2 types of Igneous Rock different? How can we use Igneous Rocks? How have they been used in the past? Can you describe the most common Intrusive Ign. Rock? Where is it commonly found?

Can you describe the most abundant Extrusive Ign. Rock? What area on Earth is mostly made of this type?

Recently Viewed Presentations

  • The Liturgical Year

    The Liturgical Year

    The ashes, made from burning the palms from the previous year, are smeared on the faithful as a reminder of mortality. Lent is a season of fasting and penitence. No meat can be eaten. On Ash Wednesday or the Fridays...
  • State Track: Reporting - Welcome to LIHEAP Performance Management

    State Track: Reporting - Welcome to LIHEAP Performance Management

    What is the purpose of this report? Serves as the grantee's application for funds. Provides information to the Federal Government and the public on how the grantee plans to use funds. How does this report contribute to program management? Grantee...
  • Signing Plan Design - TEM Chapter 6-4.0

    Signing Plan Design - TEM Chapter 6-4.0

    Office of Traffic, Safety and Technology. Signing Overview. Purpose of Signs. ... guide motorists, pedestrians, and other traffic on all public roads. ... Green: Indicates movement permitted or gives directional guidance. It is used as the background color in guide...
  • Expository Essay - Central Dauphin School District

    Expository Essay - Central Dauphin School District

    Expository Essay What you will learn from this slideshow. What an expository essay is. Definitions of each type of expository essay. What a thesis statement is. What is expository writing? (Box 1 title) Compare and Contrast Essay (Box 2 title)...
  • Introduction to the microprocessor - PSAU

    Introduction to the microprocessor - PSAU

    Introduction to the microprocessor. The ENIAC (Electronics Numerical Integrator And Calculator) is the first general purpose, programmable electronic computer • Containing over 17000 vacuum tubes. system was developed in 1946 at the University of Pennsylvania. The ENIAC has the following...
  • Image Compression - George Mason University

    Image Compression - George Mason University

    Image Compression Reference [1] Gonzalez and Woods, Digital Image Processing. ... redundancy Coding Interpixel Psychovisual Coding Redundancy How to assign codes to alphabet In digital image processing Code = gray level value or color value Alphabet is used conceptually General...
  • Szkolny Klub Wolontariatu „Pomocna dłoń"

    Szkolny Klub Wolontariatu „Pomocna dłoń"

    Szkolny Klub Wolontariatu „Pomocna dłoń" „Człowiek jest wielki nie przez to, co posiada, lecz przez to, kim jest ; nie przez to, co ma, lecz przez to, czym dzieli się z innymi".
  • Advanced Computer Networks Course Objectives

    Advanced Computer Networks Course Objectives

    Course Objectives To uncover and understand the current directions of computer networks from literature readings. To expose students to the "full span" of the computer network's frontier {a breath goal}. To encourage a performance perspective towards analysis of computer and...