June 2014

The Velodrome Recumbent Fold - France

The Velodrome is a large recumbent fold spilled southward, formed at the end of the Tertiary (23 to 5 million years) at the …

Hot springs are natural phenomena where groundwater is heated by a geothermal heat source, such as magma or hot rocks deep b…

Pelagic sediment or pelagite is a fine-grained sediment that accumulates as the result of the settling of particles to the …

Spessartine Spessartine stands out for its vibrant orange color, relative rarity, and association with manganese. While…

Banded iron formations (also known as banded ironstone formations or BIFs) a re sedimentary rocks that are composed of alt…

The same amazing Emerald specimen but this time photographed with a real camera and not a phone camera. Note the differe…

The Triple Frontier is the tri-border region where the borders of 3 countries meet: Argentina, Paraguay and Brazil. Whi…

Fitzgerald Marine Preserve, San Mateo County, CA A syncline is a fold with younger layers closer to the center of the …

Fulgurites are rare natural glass formations created when lightning strikes sand, soil, or rock. The intense heat from the …

Ore Deposits and Plate Tectonics P late tectonics, like crustal evolution, provides a basis for understanding the distribut…

Determining a Sequence of Geologic Events Law of Original Horizontality: Sedimentary rock layers were originally deposit…

While both rocks and minerals are naturally occurring solid substances, there are key differences between them: M ineral —A …

Azurite |‪#‎Geology Formula: Cu3(CO3)2(OH)2 System:Monoclinic Colour:Azure blue, blue, light ... Lustre:Vitreous Hardnes…

Lena's Pillars, also called Lena’s Stone Forest, is a natural rock formation about 60 km upriver from Yakutsk, in Russia…

Red tourmaline specimen found in Yen Bai Province - North Vietnam

Preikestolen is a mountain formed like a huge pulpit towering over the Lysefjord in Rogaland, Fjord Norway. There is a c…

This rock is a fine example of an arch in the shape of an elephant. The rock is right next to the road, but as parking …

Folded rocks are a type of rock structure that forms when layers of rock are compressed and bend instead of breaking. The f…

Image of the recent West Salt Creek Landslide that occurred on May 25th at 5:44 PM local time near Collbran, Colorad…

Opal, Queensland, Australia Opal is hydrous silica ( SiO₂·nH₂O ). Technically, opal is not a mineral because it lack…

Hematite Aggregate Fe2O3 Botryoidal Habit A globular aggregate resembling a bunch of grapes with each round mass consis…

Green Obsidian – Volcanic glass Green obsidian is a type of volcanic glass that forms when lava rich in iron and magnesi…

Blue lava, also known as Api Biru and sulfur fire, is a rare phenomenon occurring when sulfur burns. It produces an elect…