Locality: Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany FOV 3 mm. Collection Bernd Ternes, p...
Fluorite - fluorescent
Fluorite - fluorescent Rogerley Mine Frosterley Country Durham United Kingdom Size: 9.5 x 7.3 x 4.5 cm Photo Copyright © SpiriferMiner...
Anticlines and Synclines
This photo taken on U.S. 48 near Walnut Bottom, West Virginia, is an example of both anticlines and synclines in the same formation. Ant...
Blue Haüyne With Sanidine Crystals
Excellent Intensive Blue Haüyne With Sanidine Crystals. Photo Copyright © Volker Betz Excellent intensive blue and gemmy crystals of h...
What is Bowen's Reaction Series?
Bowen's reaction series is able to explain why certain types of minerals tend to be found together while others are almost never a...
Rhodochrosite, Hubnerite, Tetrahedrite, and Needle Quartz
Rhodochrosite, Hubnerite, Tetrahedrite, and Needle Quartz Hedgehog Pocket, Main Stope Drift, Sweet Home Mine, Alma, Colorado Photo Cop...
Download The General Dictionary of Geology
Edited by : Alva Kurniawan Department of Environmental Geography, Gadjah Mada University, Yogyakarta, Indonesia and : John Mc. Ken...
Why Does Earth Have Deserts?
Hadley Cell scheme (Credit: ClimateTheory) Take a look at a physical map of the world. Thirty degrees on either side of the equat...
Huge earth crack opened up in Sonora, Mexico
A one-kilometer long earth crack opened up on August 15, 2014, in Sonora, Mexico. The crack severed Highway 26 between the city of Herm...
Why Geologists Love Beer?
Fact: Geologists love beer. There is abundant proof of this here at the American Geophysical Union meeting, the largest collection of e...
How Does Bowen's Reaction Series Affect Chemical Weathering?
How Does Bowen's Reaction Series Affect Chemical Weathering? In general, minerals are most stable at the temperature and pressure a...
10 Pictures That Will Make You Want to Become a Geologist
Mt. Head, Canada Geology is a magnificent and unique science. What makes it so unique, you may rightly ask; well, a good geologist...
How Plate Tectonics Works?
1. There are two basic types of LITHOSPHERE: continental and oceanic. CONTINENTAL lithosphere has a low density because it is made of...
How to Study and Identify the Minerals Samples?
In simple terms, our planet is just a big ball of very hot stuff which, at the surface where it is exposed to space, has cooled to f...
What Is the Difference Between Quartz and White Feldspar in Rocks?
Feldspar Red Circles, Quartz yellow circles. So, if the mineral has cleavage and sparkles, it may be feldspar. If no sparkles, no ...
Iridescent Pyrite
Iridescent Pyrite Location: Shangbao Mine, Leiyang Co., Hengyang Pref., Hunan Province, China Size: 1.9" x 1.8...
Gorgeous Agate, Morocco.
Kerrouchene Khenifra Province Morocco Size: 8x6.4x4.6 cm Weight: 270 g Description: Aesthetic, colorful agate from Morocco, p...
Indicolite Tourmaline With a Large Pink Lepidolite
Gorgeous specimen of blue Indicolite Tourmaline with a large pink Lepidolite crystal to its right and a smaller Quartz crystal to its lef...
What Is the Difference Between Phaneritic and Aphanitic Rocks?
A hand specimen of granite with phaneritic (coarse grained) texture. Principal minerals are Potassium Feldspar, Biotite Mica, and Quartz...
Amazing Blue Sapphire
Today's Luxury eye Candy is just awesome, it's this Blue Sapphire weighing 72.9 cts from Graves Hill, Australia! Sapphire is...
Green Epidote Clusters Quartze
Great, aesthetic specimen of green epidote clusters on white, sharp quartzes. Great contrast and form. Specimen mounted on acrylic ba...
How Can a Volcano Erupt Mafic Lava One Time, and Then Felsic Lava Another Time?
There are several ways, but one of the common ones happens when the magma in a magma chamber has time to separate (called "differen...
Incredible Spray of Azurite Crystals
Credit: The Mineral Gallery, Inc Incredible specimen featuring a dramatic spray of Azurite crystals with ps to Malachite! For a ...
What Causes the Plates Tectonic to Move?
Let's play with some numbers. Assume that average continental crust weighs in at about 10 cubic feet to the ton. If a ton equals ...
How Does Bowen's Reaction Series Relate to the Classification of Igneous Rock?
The Bowen reaction series is a description of how magma's minerals change as they cool. It’s a means of ranking common igneous sili...
What Are the Most Important Types of Rock in the Crust?
Basalt and granite actually have quite a bit in common. Both are igneous rocks, which means that they cooled from a magma (the earth gets...
Topaz Crystal From Mexico
Photo Copyright © Tony Peterson Topaz Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminate...