High-sulphidation deposits result from fluids (dominantly gases such as SO2, HF, HCl) channeled directly from a hot magma. The flui...
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 geologi...
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...
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 s...
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...
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 petrophys...
Amazing Rosette Linarite
Amazing Rosette Linarite. Photo Copyright © Czechmin.cz large group of linarite crystals growing in "limonite" cavity. Linar...
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...
East Africa's Great Rift Valley: A Complex Rift System
The East African Rift System The East African Rift System (EARS) is one the geologic wonders of the world, a place where the earth'...
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...
Clinoclase
Clinoclase : Cu3(AsO4)(OH)3 Locality: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany gr...
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 "The River ...
Unique Annabergite Crystals
Unique Annabergite Crystals. Photo Credit: © Jean-Marc Johannet Annabergite Annabergite is an arsenate mineral consisting of...
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...
Amazing Carminite Crystals
Photo Copyright © Christian Rewitzer Carminite | #Geology Formula: PbFe 3+ 2 (AsO 4 ) 2 (OH) 2 System: Orthorhombic Lustre: Vitreou...
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...
Clinoclase Crystals
Clinoclase Crystals. Photo Copyright © Elmar Lackner Clinoclase : Cu 3 (AsO 4 )(OH) 3 Crystal System: Monoclinic Hardness: 2.5 - ...
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...
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...
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...
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...
Gemmy Apatite Crystals
Credit: Spiriferminerals.com Cluster of lustrous, gemmy apatite crystals from a classic locality. Specimen mounted on acrylic ...
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...
Seismic Interpretation Basics
Introduction: Seismic interpretation, whether for hydrocarbon exploration or geotechnical studies, is the determination of the geolo...