Rosasite, (Cu,Zn)2[(OH)2|CO3]
Locality: France
Iniskin Bay, Alaska
“The Iniskin River resembles a reflective ribbon of glass as it flows into its namesake bay.”
Photograph Robert B. Hass
Grossular, Ca3Al2(SiO4)3
Locality: Canada
Ayers Rock in Uluru National Park
“Lightning flashes over Ayers Rock, a landmark red sandstone monolith that draws tourists to Australia’s center. Uluru-Kata Tjuta National Park houses the rock, called Uluru by Aborigines, the continent’s original inhabitants.”
Photograph by Mark Laricchia/Corbis
Biotite, K(Mg,Fe)3(OH,F)2(Al,Fe)Si3O10
Locality: Germany
The Chase
“Scipionyx samniticus chasing a small mammal (don’t ask me exactly which genus is), whom seems to be pretty determined to not be catched by the theropod, according to the evident devotion it’s putting in its run.”
Geological time: Early Cretaceous
Calcite (var: Cobaltoan Calcite), (Ca,Co)CO3
Locality: Morocco
Dallol Volcano, Ethiopia
“Sulfur, salt, and other minerals color the crater of Ethiopia’s Dallol volcano.”
Photograph by Carsten Peter
Stibnite, Sb2S3
Locality: France
Ice Canyon, Greenland
“Meltwater has carved a canyon 150 feet (45 meters) deep.”
Photograph by James Balog
Vanadinite, Pb5(VO4)3Cl
Locality: Morocco
“Foraminifera: Halkyardia minima
These shells pictured here belonged to pin-head sized animals called ‘foraminifera’, or formas. These ones lived about 35 million years ago, but similar kinds live in today’s oceans.”
Image: Ian McMillan, Cardiff University
Epidote, {Ca2}{Al2Fe3+}[O|OH|SiO4|Si2O7]
Locality: Italy
Underwater Cave, Bahamas
“The Cascade Room, some 80 feet (24 meters) beneath the surface, leads divers deeper into Dan’s Cave on Abaco Island. Nearly seven miles (11 kilometers) of the cave have been explored since the mid-1990s.”
Photograph by Wes C. Skiles, National Geographic
Gold, Au
Locality: Oregon, USA