GeoPicture of the Week: Cosmic Navel, Garfield, Utah




GeoPicture of the Week: Narrow Lava River


Here we see a narrowing river of lava flows through the fractured surface of the delta, feeding the ocean entry and creating new land.


GeoPicture of the Week: The Seven Sisters of Sussex

Image via Poojycat.

The Seven Sisters are a series of chalk cliffs by the English Channel, in Sussex (doh!). In case you didn’t know, chalk is actually a porous sedimentary rock, a form of limestone composed of the mineral calcite forming in somewhat deep underwater conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-organisms called coccolithophores.   The southern and


GeoPicture of the Week: Turgite [aka unicorn dung]

Image source: Crystal Clear Radio.

Originally described from Turjinskii Mine (Turginsk Mine) in Russia, turgite is generally considered a variety of two more common minerals – goethite and hematite. Turgite is a mixture of the two minerals due to the alteration of goethite, typically found in the botryoidal (globular) habit of the “parent” goethite; however, because it is a mixture of two minerals, it is not considered a


Geopicture of the Week: A Mineral Mural

Chalcopyrite, Galena and Dolomite

This beautiful formation is made up of three mineral: Chalcopyrite (green), Galena (purple) and Dolomite (gray).


GeoPictures of the Week: Volcano Lava Creates Stunning Blue Flames


Today, we have more pictures… because I just couldn’t limit myself to one. Olivier Grunewald, a well known French photographer traveled the world to capture these stunning images of volcanic eruptions.


Geopicture of the Week: Clinoptilolite


Clinoptilolite is a natural zeolite comprising a microporous arrangement of silica and alumina tetrahedra. These zeolite crystals form when volcanic molten lava meets the sea. This chemical reaction creates a crystal with a cage-like, porous structure and negative charge, making it one of the rare, negatively-charged minerals in nature. Engineers have been exploiting this feature, using zeolites as filters for


GeoPicture of the Week: Strengite

Image via Imgur.

Strengite is a rare mineral, named after Johann August Streng, a professor of Mineralogy at University of Giessen, Germany, in the late 1800s. Streng was an assistant to Robert Bunsen at University of Heidelberg and later professor of chemistry at the Clausthal Mining Academy and was an innovator in his field (chemical titration). Strengite is a relatively rare iron phosphate mineral with the formula:


GeoPicture of the Week: Folded and Tilded Limestone in Jasper National Park, Alberta, Canada


Jasper National Park is truly amazing – beautiful rivers and valleys, several peaks over 3,000 meters, and an overall stunning geology. The western ridge forms the continental divide, separating streams that flow east and north to the Arctic Ocean or Hudson Bay from those which drain westward to the Pacific Ocean. Here, we see a tilted mountain composed of folded limestones.


GeoPicture of the Week: Pyromorphite

Pyromorphite. Image via AW Minerals.

Pyromorphite is as awesome as it sounds. The mineral is composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. However, most of the time, it is found as a secondary mineral in the oxidized zones of lead ore deposits. The color of the mineral is usually some bright shade of green, yellow or