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High-Sulphidation Deposits of Gold
High-Sulphidation Deposits of Gold

High-sulphidation deposits result from fluids (dominantly gases such as SO2, HF, HCl) channeled directly from a hot magma. The flui...

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Epithermal Systems (The association of gold mineralization with volcanic)
Epithermal Systems (The association of gold mineralization with volcanic)

The association of gold mineralization with volcanic and geothermal hot spring activity has long been recognized by prospectors and geolog...

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Green balls of conichalcite with erythrite, brown olivenite
Green balls of conichalcite with erythrite, brown olivenite

Erythrite : Co3(AsO4)2·8H2O, Olivenite : Cu2(AsO4)(OH), Conichalcite : CaCu(AsO4)(OH) Locality: La Cena del Depósito concession, Cerr...

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The Difference Between Rocks and Minerals
The Difference Between Rocks and Minerals

  A mineral is a solid formation that occurs naturally in the earth while a rock is a solid combination of more than one mineral formatio...

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 Fire Agate
Fire Agate

Fire Agate , a variety of chalcedony, is a semi-precious natural gemstone found only in certain areas of northern Mexico and the southweste...

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Petrophysics: The study of physical and chemical rock properties.
Petrophysics: The study of physical and chemical rock properties.

Petrophysics      Is the study of physical and chemical rock properties and their interactions with fluids.A major application of petro...

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Amazing rosette Linarite
Amazing rosette Linarite

large group of linarite crystals growing in "limonite" cavity. Linarite : PbCu(SO4)(OH)2 Locality: Modrá štola, Zlaté Ho...

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Normal faults in road cut near Shoshone, CA.
Normal faults in road cut near Shoshone, CA.

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Hydraulic Fracturing of Oil & Gas Wells Drilled in Shale
Hydraulic Fracturing of Oil & Gas Wells Drilled in Shale

What is Hydraulic Fracturing? Hydraulic fracturing is a procedure that can increase the flow of oil or gas from a well. It is done by p...

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East Africa's Great Rift Valley: A Complex Rift System
East Africa's Great Rift Valley: A Complex Rift System

by James Wood and Alex Guth - Michigan Technological University  The East African Rift System   The East African Rift System (EARS) i...

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Gemmy crystals of Native Sulfur atop Aragonite with Aragonite ps after Calcite!
Gemmy crystals of Native Sulfur atop Aragonite with Aragonite ps after Calcite!

Gemmy crystals of Native Sulfur atop Aragonite with Aragonite ps after Calcite! This is an impressive Sulfur specimen that is also a pse...

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Clinoclase
Clinoclase

Clinoclase : Cu3(AsO4)(OH)3 Locality: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany 2....

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The River of Five Colors, WHY and HOW?
The River of Five Colors, WHY and HOW?

Caño Cristales is a Colombian river located in the Serrania de la Macarena province of Meta. The river is commonly called "The River ...

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Unique Annabergite from Greece
Unique Annabergite from Greece

Annabergite Formula: Ni3(AsO4)2 · 8H2O System: Monoclinic Colour: Green, light grey to ... Lustre: Sub-Adamantine, Sub-Vi...

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Travertine Hot Springs at Pamukkale, Turkey
Travertine Hot Springs at Pamukkale, Turkey

Pamukkale's terraces natural site in Denizli Province in southwestern Turkey are made of travertine, a sedimentary rock deposited by w...

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Amazing Carminite Crystals
Amazing Carminite Crystals

Carminite : PbFe3+2(AsO4)2(OH)2 Locality: Alto das Quelhas do Gestoso Mine, Gestoso, Manhouce, São Pedro do Sul, Viseu District, Por...

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Volcano-powered electricity, the future of alternative energy.
Volcano-powered electricity, the future of alternative energy.

We could exploit energy from deep down in the earth, as a report from a geothermal borehole suggests. The project developed under the name...

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Exellent crystals of Clinoclase
Exellent crystals of Clinoclase

Clinoclase : Cu3(AsO4)(OH)3 Locality: Tin stope, Majuba Hill Mine (Majuba Mine; Mylar Mine; Tin Mine; Nevada Bureau of Mines and Geol...

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New theory suggests gold deposits were formed as a result of earthquakes
New theory suggests gold deposits were formed as a result of earthquakes

A new theory based on a simple but viable geologic model claims that over 80 percent of all commercial gold deposits were formed in a flas...

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Fossilized gastropod replaced by precious emerald
Fossilized gastropod replaced by precious emerald

Formed from hydrothermal fluids in a shear zone interacting with the rock they passed through, the fossil in the host black shale was t...

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Lake Mono’s Tufas
Lake Mono’s Tufas

Located in Owen’s Valley, California, Lake Mono is one of North America’s oldest lakes−over 1 million years old in fact, with a salinity...

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Largest Active Volcano on Earth shows Signs of Life
Largest Active Volcano on Earth shows Signs of Life

Recent swarms of tiny earthquakes inside Hawaii’s Mauna Loa signal that the volcano may be coming back to life. But don’t cancel your vac...

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 Fluoroapatite - CLASSIC
Fluoroapatite - CLASSIC

Panasqueira Mines Covilha Castelo Branco District Portugal Size: 5.2 x 3.5 x 1.5 cm Weight: 30 g Description: C...

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Quick Mineral Identification
Quick Mineral Identification

Quick identifying properties of several minerals.

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Significance of fossils
Significance of fossils

Explain the significance of fossils in sedimentary rocks. fossil —A remnant or trace of an organism of a some earlier geologic age, such...

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 Seismic Interpretation basics
Seismic Interpretation basics

Introduction: Seismic interpretation, whether for hydrocarbon exploration or geotechnical studies, is the determination of the geolo...

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Types of Twinning in Minerals
Types of Twinning in Minerals

Smooching Beryl twin photo: Photo By Benjamin DeCamp Crystal twinning occurs when two separate crystals share some of the same crysta...

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