How do some of geology's most mysterious iron ore deposits form? This question has preoccupied the geosciences for more than ...
Early in the Earth's development, the atmosphere contained no oxygen. Yet the iron dissolved in the oceans was oxidized in gigantic quantities and deposited as rock. It can be seen today, for example, ...
The layers you see in this image were once iron-rich and silica-rich sediments that settled on an ancient sea floor 2.7–2.4 billion years ago. Credit: The Australian Museum The layers you see in this ...
Towe, Kenneth M. 1983. "Precambrian Atmospheric Oxygen and Banded Iron Formations: A Delayed Ocean Model." Precambrian Research, 20, (2) 161–170.
Get ready to rewrite those biology textbooks – again. Although the “lowly” blue-green algae, or Cyanobacteria, have long been credited as one of Earth’s earliest life forms and the source of the ...
HOUSTON – (May 25, 2023) – Visually striking layers of burnt orange, yellow, silver, brown and blue-tinged black are characteristic of banded iron formations, sedimentary rocks that may have prompted ...
Get ready to rewrite those biology textbooks – again. Although the “lowly” blue-green algae, or Cyanobacteria, have long been credited as one of Earth’s earliest life forms and the source of the ...
Tiger Iron formed when in the sea dissolved iron reacted with free oxygen produced by the first photosynthetic life forms on Earth. For the first 2 billion years of Earth's history, there was barely ...
The people at the Smithsonian Institution National Museum of Natural History were nice enough to give a couple members of the Chemistry in Pictures team a behind-the-scenes look at their mineral ...
A new study suggests iron-rich ancient sediments may have helped cause some of the largest volcanic events in the planet's history. Visually striking layers of burnt orange, yellow, silver, brown and ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results