Published: Mon, 20 Feb 2017 11:26:38 +0000
2017-02-20T11:26:38ZIdentify 44 of the most common igneous, sedimentary and metamorphic rock types with this chart.
2017-02-20T11:26:38ZAll igneous rocks have one thing in common: they occur from the cooling and solidification of molten material.
2017-02-20T11:26:38ZBlue, violet and purple colors can be seen in many different minerals. Here is a look at some of the most common.
2017-02-20T11:26:38ZA master alphabetical guide to igneous, sedimentary and metamorphic rocks. Includes pictures of each type as well as a brief description.
2017-02-20T11:26:38ZInformation and tables on the densities of the most common rocks and minerals, with a look at porosity.
2017-02-20T11:26:38ZThe 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.
2017-02-20T11:26:38ZA guide to the most common and significant green and greenish minerals. Includes images and descriptions of each type.
2017-02-20T11:26:38ZA guide to the most common and significant black minerals.
2017-02-20T11:26:38ZA guide to the most common and significant red and pink minerals.
2017-02-20T11:26:38ZIntroducing sedimentary rocks, second of the three great rock classes (along with igneous and metamorphic rocks).
2017-02-20T11:26:38ZMineral identification starts with picking a good specimen.
2017-02-20T11:26:38ZMy master guide to annotated pictures to help you identify minerals: typical examples of rock-forming, accessory, and rare or notable minerals.
2017-02-20T11:26:38ZThe thousands of minerals known in rocks become a mere handful at the Earth's surface.
2017-02-20T11:26:38ZA short explanation of chemical weathering and carbonation, hydration, hydrolysis and oxidation.
2017-02-20T11:26:38ZThis question has several answers, depending on what a mineral is and what part of the Earth we're talking about.
2017-02-20T11:26:38ZMetamorphic rocks are formed by great heat and pressure. Most of the thousands of rare minerals known to science occur in these rocks.
2017-02-20T11:26:38Zclass="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >Granite is the
2017-02-20T11:26:38ZSandstone is made up of three ingredients, sand particles, matrix and cement, and can reveal a great deal of information to geologists.
2017-02-20T11:26:38ZIndex fossils come from organisms that were distinct, widespread, abundant and short lived. These fossils help define intervals of geologic time.
2017-02-20T11:26:38ZAn overview of the most common mineral in the Earth's crust, feldspar- how to identify it and further information.
2017-02-20T11:26:38ZLearn the basics of rocks and minerals, where to find them and what they mean in their context.
2017-02-20T11:26:38ZFaulting can cause major earthquakes and create large mountain chains. Get a more in-depth look, with helpful diagrams, here.
2017-02-20T11:26:38ZEverything you need to know about the lithosphere, including its composition, structure and thickness.
2017-02-20T11:26:38ZA guide to the most common and significant yellow minerals.
2017-02-20T11:26:38ZNotes on the most basic operation in geology.
2017-02-20T11:26:38ZQuartz is essential to the land as we know it.
2017-02-20T11:26:38ZThe United Nations' global map of seismic hazard
2017-02-20T11:26:38ZAbout the molten stuff from which all rocks arise.
2017-02-20T11:26:38ZBasalt has a key role in Earth's tectonic cycle.
2017-02-20T11:26:38ZHow big rock domes peel off in shells. Page 6.
2017-02-20T11:26:38ZA six-part look at the basics of the Earth's mantle, the part between the crust and the core.
2017-02-20T11:26:38ZA-to-Z list of minerals shown on About.com Geology.
2017-02-20T11:26:38ZWhat's the difference between clay, mud, sand and silt? Take a look at this sedimentary grain size chart for more information.
2017-02-20T11:26:38ZThe five ways we track the motion of the lithospheric plates.
2017-02-20T11:26:38ZPlutonic rocks form from igneous intrusions deep in the Earth's crust. Common plutonic rocks include granite, tonalite and quartz diorite.
2017-02-20T11:26:38ZStart here to learn the basics of plate tectonics.
2017-02-20T11:26:38ZPhyllite is a major metamorphic rock type from regional metamorphism. Page 13.
2017-02-20T11:26:38ZHere is a table listing the lithosphere's tectonic plates by order of size. The lithosphere is the brittle outer layer of the solid Earth.
2017-02-20T11:26:38ZThe granites of geology and commerce are quite different.
2017-02-20T11:26:38ZWhile they have the exact same literal definition, Earth science, geoscience and geology can mean different things depending on who you ask.
2017-02-20T11:26:38ZThe 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.
2017-02-20T11:26:38ZStart here for the seismic basics: faults that cause earthquakes, types of seismic waves, damages they cause and more.
2017-02-20T11:26:38ZMinerals with metallic luster are easy to learn to identify.
2017-02-20T11:26:38ZFind the best gifts for geologists or geology hobbyists with this comprehensive gift guide. The geologist in your life will thank you.
2017-02-20T11:26:38ZThis map gives a detailed look at the boundaries, motions and hotspots of the world's major tectonic plates.
2017-02-20T11:26:38ZSerpentinite is a major metamorphic rock type from regional metamorphism. Page 16.
2017-02-20T11:26:38ZSchist is a major metamorphic rock type from regional metamorphism. Page 15.
2017-02-20T11:26:38ZMinerals meet four criteria, more or less strict.
2017-02-20T11:26:38ZA simple procedure for analyzing the grain-size composition of sediment.
2017-02-20T11:26:38ZCalcium Carbonate Depth (CCD) explains why limestone formation is normally associated with shallow seas.
2017-02-20T11:26:38ZThe rock cycle as I see it. Geology.
2017-02-20T11:26:38ZHow geologists sort out granite from the rocks that look like it.
2017-02-20T11:26:38ZHere's how these two closely related carbonate minerals matter in the Earth system.
2017-02-20T11:26:38ZUranium-lead method is the oldest and, when done carefully, the most reliable isotopic dating method.
2017-02-20T11:26:38ZSteno (Niels Stensen) first set forth some of the basic principles that all geologists follow.
2017-02-20T11:26:38ZThe 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.
2017-02-20T11:26:38ZGrenstone is a major metamorphic rock type from regional metamorphism. Page 8.
2017-02-20T11:26:38ZA short explanation of mechanical weathering.
2017-02-20T11:26:38ZFind and see geological landforms at About.com Geology.
2017-02-20T11:26:38ZAdvice on what to look for in those 'candy boxes' full of little rocks.
2017-02-20T11:26:38ZCoal, a fossil fuel, is formed when plant matter becomes buried and compacted in an anoxic environment.
2017-02-20T11:26:38ZHome page for everything about the San Andreas fault: where it is, how it behaves, what it means.
2017-02-20T11:26:38ZBig list of mineral names and their corresponding gemstone names.
2017-02-20T11:26:38ZQuartzite is a major metamorphic rock type from regional metamorphism. Page 14.
2017-02-20T11:26:38ZThe six basic fabric types found in metamorphic rocks.
2017-02-20T11:26:38ZCascadia is America's tectonic version of Sumatra, where the great quake of 2004 occurred.
2017-02-20T11:26:38ZSubduction occurs along convergent boundaries involving at least one oceanic plate. As the tectonic plates collide, one sinks below the other.
2017-02-20T11:26:38ZBasalt is one of the major igneous rock types. Page 3.
2017-02-20T11:26:38ZScoria is one of the major igneous rock types. Page 22.
2017-02-20T11:26:38ZFossils are precious gifts from the geologic past: signs and remains of ancient living things preserved in the Earth's crust.
2017-02-20T11:26:38ZGranite is one of the major igneous rock types. Page 8.
2017-02-20T11:26:38ZPyroxenite is one of the major igneous rock types. Page 19.
2017-02-20T11:26:38ZSlate is a major metamorphic rock type from regional metamorphism. Page 17.
2017-02-20T11:26:38ZGneiss is a major metamorphic rock type from regional metamorphism. Page 6.
2017-02-20T11:26:38ZFelsite is one of the major igneous rock types. Page 6.
2017-02-20T11:26:38ZNot a rock type, it's a whole assemblage of crustal rocks.
2017-02-20T11:26:38ZGranodiorite is one of the major igneous rock types. Page 9.
2017-02-20T11:26:38ZArkose is one of the major types of sedimentary rocks. Page 2.
2017-02-20T11:26:38ZThe silica tetrahedron is the basis of the silicate minerals.
2017-02-20T11:26:38ZGeologists have named a variety of holes.
2017-02-20T11:26:38ZTransform boundaries or transform faults occur wherever the Earth's plates move past each other.
2017-02-20T11:26:38ZSiltstone is one of the major types of sedimentary rocks. Page 24.
2017-02-20T11:26:38ZWhat are the different parts of a stream? An in-depth look at stream terminology, stream order and river valleys.
2017-02-20T11:26:38ZThis interesting sedimentary rock has a key role in the geochemical cycle.
2017-02-20T11:26:38ZRhyolite is one of the major igneous rock types. Page 21.
2017-02-20T11:26:38ZDiorite is one of the major igneous rock types. Page 4.
2017-02-20T11:26:38ZPeridotite is one of the major igneous rock types. Page 15.
2017-02-20T11:26:38ZThe 10-mineral Mohs scale of relative hardness is based on which minerals scratch each other.
2017-02-20T11:26:38ZPlutons are deep-seated bodies of large-grained igneous rock. They can be exposed at the surface if erosion wears away overlying rock.
2017-02-20T11:26:38ZPotassium-argon isotopic dating is especially useful for determining the age of lavas.
2017-02-20T11:26:38ZRadioactivity and the barbecue model of dating.
2017-02-20T11:26:38ZWacke or graywacke is one of the major types of sedimentary rocks. Page 15.
2017-02-20T11:26:38ZThe whole of Earth sciences, compressed to a nutshell.
2017-02-20T11:26:38ZPegmatite is one of the major igneous rock types. Page 14.
2017-02-20T11:26:38ZChert is one of the major types of sedimentary rocks. Page 7.
2017-02-20T11:26:38ZGabbro is one of the major igneous rock types. Page 7.
2017-02-20T11:26:38ZA short explanation of orogenies, or mountain-building episodes, with examples.