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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) chann...

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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 b...

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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) Localit...

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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 combi...

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 Fire Agate
Fire Agate

Fire Agate , a variety of chalcedony, is a semi-precious natural gemstone found only in certain are...

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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 ...

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Amazing rosette Linarite
Amazing rosette Linarite

large group of linarite crystals growing in "limonite" cavity. Linarite : PbCu(SO4)...

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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...

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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 ...

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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 impre...

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Clinoclase
Clinoclase

Clinoclase : Cu3(AsO4)(OH)3 Locality: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Blac...

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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 r...

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Unique Annabergite from Greece
Unique Annabergite from Greece

Annabergite Formula: Ni3(AsO4)2 · 8H2O System: Monoclinic Colour: Green, light gr...

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Pamukkale's Terraces.
Pamukkale's Terraces.

Pamukkale's terraces natural site in Denizli Province in southwestern Turkey are made of trave...

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Carminite
Carminite

Carminite : PbFe3+2(AsO4)2(OH)2 Locality: Alto das Quelhas do Gestoso Mine, Gestoso, Manhou...

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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 sugges...

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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; T...

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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 commer...

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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, ...

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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 mi...

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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...

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 Fluoroapatite - CLASSIC
Fluoroapatite - CLASSIC

Panasqueira Mines Covilha Castelo Branco District Portugal Size: 5.2 x 3.5 x 1....

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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 st...

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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 separat...

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