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Preview: About.com Geology: What's Hot Now

About.com Geology: What's Hot Now



These articles that had the largest increase in popularity over the last week



 



Where to Look for Rocks and Minerals

2017-01-17T11:03:12Z

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



Steno Started Geology with a Few Simple...

2017-01-17T11:03:12Z

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



Geology of the Appalachian Mountains

2017-01-17T11:03:12Z

The Appalachian Mountains contain a very complex (and lengthy) geologic history. Learn more about what makes them so special.



Silica Tetrahedron Defined and Explained

2017-01-17T11:03:12Z

The silica tetrahedron is the basis of the silicate minerals.



How Old Is the Ocean Floor?

2017-01-17T11:03:12Z

The oceanic crust is much younger than the continental crust, rarely reaching more than 180 million years in age.



Supercontinents of the Past and Future

2017-01-17T11:03:12Z

Several times in Earth history, plate tectonics has pushed all or most of the continents together into one big mass.



Actinolite

2017-01-17T11:03:12Z

Actinolite is a major amphibole mineral. Page 5.



Slate

2017-01-17T11:03:12Z

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



The Scientific Definition of a Mineral

2017-01-17T11:03:12Z

Minerals meet four criteria, more or less strict.



Is 'Petrified' Different From 'Fossilized'?

2017-01-17T11:03:12Z

What a petrified thing is as opposed to a fossilized thing.



Augite

2017-01-17T11:03:12Z

Augite is one of the pyroxene minerals. Page 2.



Subduction: The Sinking of Tectonic Plates

2017-01-17T11:03:12Z

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



Utah Geologic Map

2017-01-17T11:03:12Z

Geologic map of Utah, part of a set of all 50 states. Page 44.



Pyroxenite

2017-01-17T11:03:12Z

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






Tuff

2017-01-17T11:03:12Z

Tuff is one of the major igneous rock types. Page 26.



Quartz Monzonite

2017-01-17T11:03:12Z

Quartz monzonite is one of the major igneous rock types. Page 20.



The Bowen Reaction Series

2017-01-17T11:03:12Z

About this staple of igneous petrology.



Troctolite

2017-01-17T11:03:12Z

Troctolite is one of the gabbroid rocks: igneous, plutonic and mafic. Page 25.



Index Fossils: The Key to Telling Deep Time

2017-01-17T11:03:12Z

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



The Gold Rushes

2017-01-17T11:03:12Z




More Than 50 Different Landforms in Pictures

2017-01-17T11:03:12Z

Find and see geological landforms at About.com Geology.



Quartz

2017-01-17T11:03:12Z

Quartz is classified as a rock-forming mineral. Page 9.



Unconformities: Gaps in the Record

2017-01-17T11:03:12Z

In rocks, what is not there can be as informative as what is there.



Texas Geologic Map

2017-01-17T11:03:12Z

Geologic map of Texas, part of a set of all 50 states. Page 43.