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Preview: Geology: What's Hot Now Geology: What's Hot Now

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

Published: Tue, 25 Oct 2016 11:04:07 +0000


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

Zircon, Zirconia, Zirconium Minerals
The zirconium minerals zircon, baddeleyite and zirconolite are a close family.

Feldspar (Orthoclase)
Feldspar is a major rock-forming mineral. Page 5.

The Truth About Salt - The Most Intimate Mineral
Salt is the only dietary mineral that's really a mineral. It comes from the sea and from solid layers underground.

Holes in Rocks
Geologists have named a variety of holes.

Pyroxene (Augite)
Pyroxene is a rock-forming mineral. Page 8.

Magnetic Reversals and Seafloor Stripes
How we track Earth's magnetism back in geologic time, and what that tells us.

Plate Tectonics Explains How the Earth's...
Start here to learn the basics of plate tectonics.

QAP Diagram for Volcanic Rocks
Ternary diagram showing IUGS classification of volcanic rocks. Page 2.

Conglomerate Picture Gallery
An assortment of conglomerates.

Measuring Plate Motion
The five ways we track the motion of the lithospheric plates.

Epidote is one of the silicate minerals. Page 10.

Nevada Geologic Map
Geologic map of Nevada, part of a set of all 50 states. Page 28.

Identification Key for the Rock-Forming Minerals
Quick identification table for the minerals that form the majority of rocks.

The Official State Gemstones, In One List
Thirty-five states have official gems or gemstones, while Montana and Nevada have two. Here they all are, along with the date that they were adopted.

Glaucophane in the gallery of amphibole minerals. Page 9.

South Dakota Geologic Map
Geologic map of South Dakota, part of a set of all 50 states. Page 41.

Quartz and Silica Minerals Gallery
Get familiar with quartz.

Calcite is a rock-forming mineral, most important in limestone. Page 3.

What You Should Know about the Earth's Core
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.

Is Coal a Rock, Mineral or Fossil?
Coal, a fossil fuel, is formed when plant matter becomes buried and compacted in an anoxic environment.

The Geology Behind Asbestos Minerals
This mineral resource has been first a boon, then a bane in its century of commercial existence. Learn more about the minerals themselves.

Flute Casts, Mongolia
Flute casts are widespread signs of geologic history in sedimentary rocks. Page 8.

Iowa Geologic Map
Geologic map of Iowa, part of a set of all 50 states. Page 15.

Actinolite, Northern California
Actinolite in the gallery of amphibole minerals. Page 6.

Unconformities: Gaps in the Record
In rocks, what is not there can be as informative as what is there.

Solifluction - Definition and Examples in Geology
The special form of soil flow typical of glaciated regions.

Earthquakes - The Basics in a Nutshell
Start here for the seismic basics: faults that cause earthquakes, types of seismic waves, damages they cause and more.

What You Should Know About the San Andreas Fault
Home page for everything about the San Andreas fault: where it is, how it behaves, what it means.