July 2014

High-Sulphidation Deposits of Gold

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

Epithermal Systems

Epithermal systems are fascinating geological areas where hot, acidic hydrothermal fluids circulate near the Earth's sur…

Green Balls of Conichalcite With Erythrite, Brown Olivenite

Green balls of conichalcite with erythrite, brown olivenite. Photo & Collection IOB Sylvano Green balls of conichalc…

The Difference Between Rocks and Minerals

Rocks Vs. Minerals Rocks and minerals are both naturally occurring solid substances that are found in the Earth's crus…

Fire Agate

Fire Agate , a variety of chalcedony, is a semi-precious natural gemstone found only in certain areas of northern Mexico an…

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 applicat…

Amazing Rosette Linarite

Amazing Rosette Linarite. Photo Copyright © Czechmin.cz large group of linarite crystals growing in "limonite"…

Normal Faults in Road Cut Near Shoshone - California

Normal Faults in Road Cut Near Shoshone - California Normal, or Dip-slip, faults are inclined fractures where the blocks h…

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.…

East African Rift

East African Rift Valley: A Complex Rift System   The East African Rift (EAR) or East African Rift System (EARS) is a massi…

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 th…

Clinoclase

Clinoclase Crystals. Collection & Photo Matteo Chinellato A group of green dark Spangolite crystals and blue Conne…

The River of Five Colors

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

Unique Annabergite Crystals

Unique Annabergite Crystals. Photo Credit:  © Jean-Marc Johannet Annabergite Annabergite is an arsenate miner…

Travertine Terraces: Pamukkale - Turkey

Pamukkale's terraces natural site in Denizli Province in southwestern Turkey are made of travertine, a sedimentary roc…

Amazing Carminite Crystals

Photo Copyright © Christian Rewitzer Carminite | ‪#‎Geology Formula: PbFe 3+ 2 (AsO 4 ) 2 (OH) 2 System: Orthorhombic…

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 develope…

Clinoclase Crystals

Clinoclase is a rare secondary copper mineral and forms acicular crystals in the fractured weathered zone above copper sulf…

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 …

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 b…

Mono Lake Tufa

Lake Mono’s Tufas. Photo Credit: Tim Malabuyo The unusual rock formations that grace Mono Lake’s shores are known as tuf…