Published: Thu, 19 Jan 2017 11:27:41 +0000
2017-01-19T11:27:41ZIdentify 44 of the most common igneous, sedimentary and metamorphic rock types with this chart.
2017-01-19T11:27:41ZAll igneous rocks have one thing in common: they occur from the cooling and solidification of molten material.
2017-01-19T11:27:41ZBlue, violet and purple colors can be seen in many different minerals. Here is a look at some of the most common.
2017-01-19T11:27:41ZA master alphabetical guide to igneous, sedimentary and metamorphic rocks. Includes pictures of each type as well as a brief description.
2017-01-19T11:27:41ZInformation and tables on the densities of the most common rocks and minerals, with a look at porosity.
2017-01-19T11:27:41ZThe 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.
2017-01-19T11:27:41ZA guide to the most common and significant green and greenish minerals. Includes images and descriptions of each type.
2017-01-19T11:27:41ZA guide to the most common and significant black minerals.
2017-01-19T11:27:41ZA guide to the most common and significant red and pink minerals.
2017-01-19T11:27:41ZIntroducing sedimentary rocks, second of the three great rock classes (along with igneous and metamorphic rocks).
2017-01-19T11:27:41ZMineral identification starts with picking a good specimen.
2017-01-19T11:27:41ZMy master guide to annotated pictures to help you identify minerals: typical examples of rock-forming, accessory, and rare or notable minerals.
2017-01-19T11:27:41ZThe thousands of minerals known in rocks become a mere handful at the Earth's surface.
2017-01-19T11:27:41ZA short explanation of chemical weathering and carbonation, hydration, hydrolysis and oxidation.
2017-01-19T11:27:41ZThis question has several answers, depending on what a mineral is and what part of the Earth we're talking about.
2017-01-19T11:27:41ZMetamorphic rocks are formed by great heat and pressure. Most of the thousands of rare minerals known to science occur in these rocks.
2017-01-19T11:27:41Zclass="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >Granite is the
2017-01-19T11:27:41ZSandstone is made up of three ingredients, sand particles, matrix and cement, and can reveal a great deal of information to geologists.
2017-01-19T11:27:41ZIndex fossils come from organisms that were distinct, widespread, abundant and short lived. These fossils help define intervals of geologic time.
2017-01-19T11:27:41ZAn overview of the most common mineral in the Earth's crust, feldspar- how to identify it and further information.
2017-01-19T11:27:41ZLearn the basics of rocks and minerals, where to find them and what they mean in their context.
2017-01-19T11:27:41ZFaulting can cause major earthquakes and create large mountain chains. Get a more in-depth look, with helpful diagrams, here.
2017-01-19T11:27:41ZEverything you need to know about the lithosphere, including its composition, structure and thickness.
2017-01-19T11:27:41ZA guide to the most common and significant yellow minerals.
2017-01-19T11:27:41ZNotes on the most basic operation in geology.
2017-01-19T11:27:41ZQuartz is essential to the land as we know it.
2017-01-19T11:27:41ZThe United Nations' global map of seismic hazard
2017-01-19T11:27:41ZAbout the molten stuff from which all rocks arise.
2017-01-19T11:27:41ZBasalt has a key role in Earth's tectonic cycle.
2017-01-19T11:27:41ZHow big rock domes peel off in shells. Page 6.
2017-01-19T11:27:41ZA six-part look at the basics of the Earth's mantle, the part between the crust and the core.
2017-01-19T11:27:41ZA-to-Z list of minerals shown on About.com Geology.
2017-01-19T11:27:41ZWhat's the difference between clay, mud, sand and silt? Take a look at this sedimentary grain size chart for more information.
2017-01-19T11:27:41ZThe five ways we track the motion of the lithospheric plates.
2017-01-19T11:27:41ZPlutonic rocks form from igneous intrusions deep in the Earth's crust. Common plutonic rocks include granite, tonalite and quartz diorite.
2017-01-19T11:27:41ZStart here to learn the basics of plate tectonics.
2017-01-19T11:27:41ZPhyllite is a major metamorphic rock type from regional metamorphism. Page 13.
2017-01-19T11:27:41ZHere is a table listing the lithosphere's tectonic plates by order of size. The lithosphere is the brittle outer layer of the solid Earth.
2017-01-19T11:27:41ZThe granites of geology and commerce are quite different.
2017-01-19T11:27:41ZWhile they have the exact same literal definition, Earth science, geoscience and geology can mean different things depending on who you ask.
2017-01-19T11:27:41ZThe 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.
2017-01-19T11:27:41ZStart here for the seismic basics: faults that cause earthquakes, types of seismic waves, damages they cause and more.
2017-01-19T11:27:41ZMinerals with metallic luster are easy to learn to identify.
2017-01-19T11:27:41ZFind the best gifts for geologists or geology hobbyists with this comprehensive gift guide. The geologist in your life will thank you.
2017-01-19T11:27:41ZThis map gives a detailed look at the boundaries, motions and hotspots of the world's major tectonic plates.
2017-01-19T11:27:41ZSerpentinite is a major metamorphic rock type from regional metamorphism. Page 16.
2017-01-19T11:27:41ZSchist is a major metamorphic rock type from regional metamorphism. Page 15.
2017-01-19T11:27:41ZMinerals meet four criteria, more or less strict.
2017-01-19T11:27:41ZA simple procedure for analyzing the grain-size composition of sediment.
2017-01-19T11:27:41ZCalcium Carbonate Depth (CCD) explains why limestone formation is normally associated with shallow seas.
2017-01-19T11:27:41ZThe rock cycle as I see it. Geology.
2017-01-19T11:27:41ZHow geologists sort out granite from the rocks that look like it.
2017-01-19T11:27:41ZHere's how these two closely related carbonate minerals matter in the Earth system.
2017-01-19T11:27:41ZUranium-lead method is the oldest and, when done carefully, the most reliable isotopic dating method.
2017-01-19T11:27:41ZSteno (Niels Stensen) first set forth some of the basic principles that all geologists follow.
2017-01-19T11:27:41ZThe 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.
2017-01-19T11:27:41ZGrenstone is a major metamorphic rock type from regional metamorphism. Page 8.
2017-01-19T11:27:41ZA short explanation of mechanical weathering.
2017-01-19T11:27:41ZFind and see geological landforms at About.com Geology.
2017-01-19T11:27:41ZAdvice on what to look for in those 'candy boxes' full of little rocks.
2017-01-19T11:27:41ZCoal, a fossil fuel, is formed when plant matter becomes buried and compacted in an anoxic environment.
2017-01-19T11:27:41ZHome page for everything about the San Andreas fault: where it is, how it behaves, what it means.
2017-01-19T11:27:41ZBig list of mineral names and their corresponding gemstone names.
2017-01-19T11:27:41ZQuartzite is a major metamorphic rock type from regional metamorphism. Page 14.
2017-01-19T11:27:41ZThe six basic fabric types found in metamorphic rocks.
2017-01-19T11:27:41ZCascadia is America's tectonic version of Sumatra, where the great quake of 2004 occurred.
2017-01-19T11:27:41ZSubduction occurs along convergent boundaries involving at least one oceanic plate. As the tectonic plates collide, one sinks below the other.
2017-01-19T11:27:41ZBasalt is one of the major igneous rock types. Page 3.
2017-01-19T11:27:41ZScoria is one of the major igneous rock types. Page 22.
2017-01-19T11:27:41ZFossils are precious gifts from the geologic past: signs and remains of ancient living things preserved in the Earth's crust.
2017-01-19T11:27:41ZGranite is one of the major igneous rock types. Page 8.
2017-01-19T11:27:41ZPyroxenite is one of the major igneous rock types. Page 19.
2017-01-19T11:27:41ZSlate is a major metamorphic rock type from regional metamorphism. Page 17.
2017-01-19T11:27:41ZGneiss is a major metamorphic rock type from regional metamorphism. Page 6.
2017-01-19T11:27:41ZFelsite is one of the major igneous rock types. Page 6.
2017-01-19T11:27:41ZNot a rock type, it's a whole assemblage of crustal rocks.
2017-01-19T11:27:41ZGranodiorite is one of the major igneous rock types. Page 9.
2017-01-19T11:27:41ZArkose is one of the major types of sedimentary rocks. Page 2.
2017-01-19T11:27:41ZThe silica tetrahedron is the basis of the silicate minerals.
2017-01-19T11:27:41ZGeologists have named a variety of holes.
2017-01-19T11:27:41ZTransform boundaries or transform faults occur wherever the Earth's plates move past each other.
2017-01-19T11:27:41ZSiltstone is one of the major types of sedimentary rocks. Page 24.
2017-01-19T11:27:41ZWhat are the different parts of a stream? An in-depth look at stream terminology, stream order and river valleys.
2017-01-19T11:27:41ZThis interesting sedimentary rock has a key role in the geochemical cycle.
2017-01-19T11:27:41ZRhyolite is one of the major igneous rock types. Page 21.
2017-01-19T11:27:41ZDiorite is one of the major igneous rock types. Page 4.
2017-01-19T11:27:41ZPeridotite is one of the major igneous rock types. Page 15.
2017-01-19T11:27:41ZThe 10-mineral Mohs scale of relative hardness is based on which minerals scratch each other.
2017-01-19T11:27:41ZPlutons are deep-seated bodies of large-grained igneous rock. They can be exposed at the surface if erosion wears away overlying rock.
2017-01-19T11:27:41ZPotassium-argon isotopic dating is especially useful for determining the age of lavas.
2017-01-19T11:27:41ZRadioactivity and the barbecue model of dating.
2017-01-19T11:27:41ZWacke or graywacke is one of the major types of sedimentary rocks. Page 15.
2017-01-19T11:27:41ZThe whole of Earth sciences, compressed to a nutshell.
2017-01-19T11:27:41ZPegmatite is one of the major igneous rock types. Page 14.
2017-01-19T11:27:41ZChert is one of the major types of sedimentary rocks. Page 7.
2017-01-19T11:27:41ZGabbro is one of the major igneous rock types. Page 7.
2017-01-19T11:27:41ZA short explanation of orogenies, or mountain-building episodes, with examples.