Subscribe: About.com Geology: Most Popular Articles
http://z.about.com/6/o/m/geology_p2.xml
Added By: Feedage Forager Feedage Grade B rated
Language: English
Tags:
common  earth  igneous rock  igneous  major igneous  major  metamorphic  minerals  page  rock types  rock  rocks  types page  types 
Rate this Feed
Rate this feedRate this feedRate this feedRate this feedRate this feed
Rate this feed 1 starRate this feed 2 starRate this feed 3 starRate this feed 4 starRate this feed 5 star

Comments (0)

Feed Details and Statistics Feed Statistics
Preview: About.com Geology: Most Popular Articles

About.com Geology: Most Popular Articles



These articles are the most popular over the last month.



Published: Mon, 20 Feb 2017 11:26:38 +0000

 



Identify Almost Any Rock with This Table

2017-02-20T11:26:38Z

Identify 44 of the most common igneous, sedimentary and metamorphic rock types with this chart.



What You Need to Know About Igneous Rocks

2017-02-20T11:26:38Z

All igneous rocks have one thing in common: they occur from the cooling and solidification of molten material.



What Are the Most Common Blue and Purple...

2017-02-20T11:26:38Z

Blue, violet and purple colors can be seen in many different minerals. Here is a look at some of the most common.



Use This Master Index of Rock Pictures

2017-02-20T11:26:38Z

A master alphabetical guide to igneous, sedimentary and metamorphic rocks. Includes pictures of each type as well as a brief description.



The Density of Common Rocks and Minerals

2017-02-20T11:26:38Z

Information and tables on the densities of the most common rocks and minerals, with a look at porosity.



Why the Earth's Crust Is So Important

2017-02-20T11:26:38Z

The Earth's crust is the thin, rocky layer that makes up our planet's shell. It is exceptionally important, and not just because we live on it.



The Most Common Green Minerals in Nature

2017-02-20T11:26:38Z

A guide to the most common and significant green and greenish minerals. Includes images and descriptions​ of each type.



What a Black Mineral Is Most Likely to Be

2017-02-20T11:26:38Z

A guide to the most common and significant black minerals.



What Is My Red or Pink Mineral?

2017-02-20T11:26:38Z

A guide to the most common and significant red and pink minerals.



What to Know About Sedimentary Rocks

2017-02-20T11:26:38Z

Introducing sedimentary rocks, second of the three great rock classes (along with igneous and metamorphic rocks).



10 Steps to Help You Identify Any Mineral

2017-02-20T11:26:38Z

Mineral identification starts with picking a good specimen.



Identify Typical Minerals with This Master...

2017-02-20T11:26:38Z

My master guide to annotated pictures to help you identify minerals: typical examples of rock-forming, accessory, and rare or notable minerals.



What Rocks Erode Into: Minerals of the Earth's...

2017-02-20T11:26:38Z

The thousands of minerals known in rocks become a mere handful at the Earth's surface.



What Is Chemical Weathering?

2017-02-20T11:26:38Z

A short explanation of chemical weathering and carbonation, hydration, hydrolysis and oxidation.



What Is the Most Common Mineral on Earth?

2017-02-20T11:26:38Z

This question has several answers, depending on what a mineral is and what part of the Earth we're talking about.



What Makes Metamorphic Rocks Unique

2017-02-20T11:26:38Z

Metamorphic rocks are formed by great heat and pressure. Most of the thousands of rare minerals known to science occur in these rocks.



All About Granite

2017-02-20T11:26:38Z

class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >Granite is the



Sandstone: What It Is and What It Tells Us

2017-02-20T11:26:38Z

Sandstone is made up of three ingredients, sand particles, matrix and cement, and can reveal a great deal of information to geologists.



Index Fossils: The Key to Telling Deep Time

2017-02-20T11:26:38Z

Index fossils come from organisms that were distinct, widespread, abundant and short lived. These fossils help define intervals of geologic time.



How to Tell the Feldspar Minerals Apart

2017-02-20T11:26:38Z

An overview of the most common mineral in the Earth's crust, feldspar- how to identify it and further information.



Where to Look for Rocks and Minerals

2017-02-20T11:26:38Z

Learn the basics of rocks and minerals, where to find them and what they mean in their context.



Fault Types with Diagrams

2017-02-20T11:26:38Z

Faulting can cause major earthquakes and create large mountain chains. Get a more in-depth look, with helpful diagrams, here.



Everything You Need to Know About the Lithosphere

2017-02-20T11:26:38Z

Everything you need to know about the lithosphere, including its composition, structure and thickness.



What Is My Yellow Mineral?

2017-02-20T11:26:38Z

A guide to the most common and significant yellow minerals.



How to Look at a Rock Like a Geologist

2017-02-20T11:26:38Z

Notes on the most basic operation in geology.



Quartz: How to Tell It, Different Kinds, What...

2017-02-20T11:26:38Z

Quartz is essential to the land as we know it.



Where Are the Greatest Earthquake Threats in...

2017-02-20T11:26:38Z

The United Nations' global map of seismic hazard



Magma and Lava - How It Melts, Rises, and Evolves

2017-02-20T11:26:38Z

About the molten stuff from which all rocks arise.



The Story of Basalt

2017-02-20T11:26:38Z

Basalt has a key role in Earth's tectonic cycle.



Exfoliation

2017-02-20T11:26:38Z

How big rock domes peel off in shells. Page 6.



6 Things to Know About the Earth's Mantle

2017-02-20T11:26:38Z

A six-part look at the basics of the Earth's mantle, the part between the crust and the core.



Mineral Pictures A to Z

2017-02-20T11:26:38Z

A-to-Z list of minerals shown on About.com Geology.



What's the Difference Between Mud, Clay and Silt?

2017-02-20T11:26:38Z

What's the difference between clay, mud, sand and silt? Take a look at this sedimentary grain size chart for more information.



Measuring Plate Motion

2017-02-20T11:26:38Z

The five ways we track the motion of the lithospheric plates.



Plutonic Rocks - Definition and Examples

2017-02-20T11:26:38Z

Plutonic rocks form from igneous intrusions deep in the Earth's crust. Common plutonic rocks include granite, tonalite and quartz diorite.



Plate Tectonics Explains How the Earth's...

2017-02-20T11:26:38Z

Start here to learn the basics of plate tectonics.



Phyllite

2017-02-20T11:26:38Z

Phyllite is a major metamorphic rock type from regional metamorphism. Page 13.



Here are the Sizes of Tectonic or Lithospheric...

2017-02-20T11:26:38Z

Here is a table listing the lithosphere's tectonic plates by order of size. The lithosphere is the brittle outer layer of the solid Earth.



What rock is my granite countertop or tile,...

2017-02-20T11:26:38Z

The granites of geology and commerce are quite different.



What's the Difference Between Geology,...

2017-02-20T11:26:38Z

While they have the exact same literal definition, Earth science, geoscience and geology can mean different things depending on who you ask.



How Volcanoes Caused the Great Dying: The...

2017-02-20T11:26:38Z

The greatest mass extinction of the last 500 million years or Phanerozoic Eon happened 250 million years ago, ending the Permian Period and beginning the Triassic Period.



Earthquakes - The Basics in a Nutshell

2017-02-20T11:26:38Z

Start here for the seismic basics: faults that cause earthquakes, types of seismic waves, damages they cause and more.



Minerals with Metallic Luster

2017-02-20T11:26:38Z

Minerals with metallic luster are easy to learn to identify.



Geologic Gift Guide: Best Places to Find Gifts...

2017-02-20T11:26:38Z

Find the best gifts for geologists or geology hobbyists with this comprehensive gift guide. The geologist in your life will thank you.



A Detailed Map of Tectonic Plate Boundaries

2017-02-20T11:26:38Z

This map gives a detailed look at the boundaries, motions and hotspots of the world's major tectonic plates.



Serpentinite

2017-02-20T11:26:38Z

Serpentinite is a major metamorphic rock type from regional metamorphism. Page 16.



Schist

2017-02-20T11:26:38Z

Schist is a major metamorphic rock type from regional metamorphism. Page 15.



The Scientific Definition of a Mineral

2017-02-20T11:26:38Z

Minerals meet four criteria, more or less strict.



Quick Sediment Testing: Particle Size

2017-02-20T11:26:38Z

A simple procedure for analyzing the grain-size composition of sediment.



Carbonate Compensation Depth:

2017-02-20T11:26:38Z

Calcium Carbonate Depth (CCD) explains why limestone formation is normally associated with shallow seas.



Rock Cycle Diagram

2017-02-20T11:26:38Z

The rock cycle as I see it. Geology.



How to Tell Apart the Granitoid Rocks

2017-02-20T11:26:38Z

How geologists sort out granite from the rocks that look like it.



Calcite or Aragonite: Which Forms When?

2017-02-20T11:26:38Z

Here's how these two closely related carbonate minerals matter in the Earth system.



Uranium-Lead Dating

2017-02-20T11:26:38Z

Uranium-lead method is the oldest and, when done carefully, the most reliable isotopic dating method.



Steno Started Geology with a Few Simple...

2017-02-20T11:26:38Z

Steno (Niels Stensen) first set forth some of the basic principles that all geologists follow.



What You Should Know about the Earth's Core

2017-02-20T11:26:38Z

The whole Earth on average consists of the same mixture of stuff we see elsewhere in the solar system, but the core has to be iron metal along with some nickel.



Greenstone

2017-02-20T11:26:38Z

Grenstone is a major metamorphic rock type from regional metamorphism. Page 8.



Mechanical Weathering

2017-02-20T11:26:38Z

A short explanation of mechanical weathering.



More Than 50 Different Landforms in Pictures

2017-02-20T11:26:38Z

Find and see geological landforms at About.com Geology.



Before You Buy a Rock Collection

2017-02-20T11:26:38Z

Advice on what to look for in those 'candy boxes' full of little rocks.



Is Coal a Rock, Mineral or Fossil?

2017-02-20T11:26:38Z

Coal, a fossil fuel, is formed when plant matter becomes buried and compacted in an anoxic environment.



What You Should Know About the San Andreas Fault

2017-02-20T11:26:38Z

Home page for everything about the San Andreas fault: where it is, how it behaves, what it means.



Translate Names Between Gemstones and Minerals

2017-02-20T11:26:38Z

Big list of mineral names and their corresponding gemstone names.



Quartzite

2017-02-20T11:26:38Z

Quartzite is a major metamorphic rock type from regional metamorphism. Page 14.



Metamorphic Fabrics

2017-02-20T11:26:38Z

The six basic fabric types found in metamorphic rocks.



The Great Cascadia Earthquake of 2xxx

2017-02-20T11:26:38Z

Cascadia is America's tectonic version of Sumatra, where the great quake of 2004 occurred.



Subduction: The Sinking of Tectonic Plates

2017-02-20T11:26:38Z

Subduction occurs along convergent boundaries involving at least one oceanic plate. As the tectonic plates collide, one sinks below the other.



Basalt

2017-02-20T11:26:38Z

Basalt is one of the major igneous rock types. Page 3.



Scoria

2017-02-20T11:26:38Z

Scoria is one of the major igneous rock types. Page 22.






Fossils: What They Are, How They Form, How They...

2017-02-20T11:26:38Z

Fossils are precious gifts from the geologic past: signs and remains of ancient living things preserved in the Earth's crust.



Granite

2017-02-20T11:26:38Z

Granite is one of the major igneous rock types. Page 8.



Pyroxenite

2017-02-20T11:26:38Z

Pyroxenite is one of the major igneous rock types. Page 19.



Slate

2017-02-20T11:26:38Z

Slate is a major metamorphic rock type from regional metamorphism. Page 17.



Gneiss

2017-02-20T11:26:38Z

Gneiss is a major metamorphic rock type from regional metamorphism. Page 6.



Felsite

2017-02-20T11:26:38Z

Felsite is one of the major igneous rock types. Page 6.



What Is an Ophiolite?

2017-02-20T11:26:38Z

Not a rock type, it's a whole assemblage of crustal rocks.



Granodiorite

2017-02-20T11:26:38Z

Granodiorite is one of the major igneous rock types. Page 9.



Arkose

2017-02-20T11:26:38Z

Arkose is one of the major types of sedimentary rocks. Page 2.



Silica Tetrahedron Defined and Explained

2017-02-20T11:26:38Z

The silica tetrahedron is the basis of the silicate minerals.



Holes in Rocks

2017-02-20T11:26:38Z

Geologists have named a variety of holes.



Transform Boundaries - When Earth's Plates Move...

2017-02-20T11:26:38Z

Transform boundaries or transform faults occur wherever the Earth's plates move past each other.



Siltstone

2017-02-20T11:26:38Z

Siltstone is one of the major types of sedimentary rocks. Page 24.



What Are the Different Parts of a Stream?

2017-02-20T11:26:38Z

What are the different parts of a stream? An in-depth look at stream terminology, stream order and river valleys.



Chert - Ingredients, Attributes, Meaning, and...

2017-02-20T11:26:38Z

This interesting sedimentary rock has a key role in the geochemical cycle.



Rhyolite

2017-02-20T11:26:38Z

Rhyolite is one of the major igneous rock types. Page 21.









Diorite

2017-02-20T11:26:38Z

Diorite is one of the major igneous rock types. Page 4.



Peridotite

2017-02-20T11:26:38Z

Peridotite is one of the major igneous rock types. Page 15.



How to Use the Mohs Hardness Scale to Identify...

2017-02-20T11:26:38Z

The 10-mineral Mohs scale of relative hardness is based on which minerals scratch each other.



What Is a Pluton?

2017-02-20T11:26:38Z

Plutons are deep-seated bodies of large-grained igneous rock. They can be exposed at the surface if erosion wears away overlying rock.



Potassium-Argon Dating Methods

2017-02-20T11:26:38Z

Potassium-argon isotopic dating is especially useful for determining the age of lavas.



About Isotopic Dating: Yardsticks for Geologic...

2017-02-20T11:26:38Z

Radioactivity and the barbecue model of dating.



Graywacke or Wacke

2017-02-20T11:26:38Z

Wacke or graywacke is one of the major types of sedimentary rocks. Page 15.



What Is Geology?

2017-02-20T11:26:38Z

The whole of Earth sciences, compressed to a nutshell.



Pegmatite

2017-02-20T11:26:38Z

Pegmatite is one of the major igneous rock types. Page 14.



Chert

2017-02-20T11:26:38Z

Chert is one of the major types of sedimentary rocks. Page 7.



Gabbro

2017-02-20T11:26:38Z

Gabbro is one of the major igneous rock types. Page 7.



What is an Orogeny?

2017-02-20T11:26:38Z

A short explanation of orogenies, or mountain-building episodes, with examples.