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Rocks

An atlas of rocks and minerals: each one a record of the conditions that made it.

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Danakil Depression: Earth’s Hottest Rift

Introduction

Before sunrise the salt plain gives nothing away. The Asale...

June 5, 2026

  • Volcanology

Ol Doinyo Lengai: The Black-Lava Volcano That Turns White

Introduction

A guide and a tourist are picking their way across...

June 5, 2026

  • Volcanology

Why Lava Cracks Into Hexagons: Columnar Basalt Explained

Introduction

Some patterns in nature look too deliberate to be accidental. The hexagonal...

June 4, 2026

  • Petrology

Shanay-Timpishka: The Amazon’s Boiling River

Introduction

Walk the bank of the Shanay-timpishka and the first thing...

June 4, 2026

  • Geophysics

Desert Varnish: Microbes, Manganese, and Mars

Introduction

Desert varnish is a dark, paper-thin coating of manganese and...

June 4, 2026

  • Geochemistry

Batagay Megaslump: Siberia’s Growing Permafrost Wound

Introduction

The Batagay megaslump, often called the Batagaika crater, is the largest retrogressive...

June 3, 2026

  • Geomorphology

How Mega Floods Carved Washington’s Scablands

Introduction

On the evening of January 12, 1927, a 44-year-old geology...

June 3, 2026

  • Geomorphology

Lituya Bay: The Tallest Wave Ever Recorded

Introduction

On the night of July 9, 1958, a wall of...

June 2, 2026

  • Geohazards

Kola Superdeep Borehole: The Deepest Hole on Earth

Introduction

On a low rise of Arctic tundra near the Norwegian...

June 2, 2026

  • Geophysics

Earthquake Lights: The Science Behind the Glow

Introduction

Just before 11 p.m. on 8 September 2023, security cameras around Marrakech...

June 1, 2026

  • Geophysics

Oklo: Earth’s Natural Nuclear Reactor

Introduction

In May 1972, at the uranium-enrichment plant at Pierrelatte in...

June 1, 2026

Lost City Hydrothermal Field: Where Life May Have Begun

A Light in the Abyss

The Lost City Hydrothermal Field is...

May 31, 2026

  • Geochemistry

Blood Falls: Why an Antarctic Glacier Bleeds

Introduction

In the summer field season of 1911, a young Australian geologist named...

May 30, 2026

  • Glaciology

What Is a Limnic Eruption? Lake Kivu’s Hidden Risk

Introduction

A limnic eruption is one of Earth’s strangest killers, an...

May 30, 2026

  • Geohazards

Eye of the Sahara: The Richat Structure Explained

Introduction

On June 4, 1965, James McDivitt and Ed White were four days...

May 30, 2026

  • Geomorphology

Naica Cave of Crystals: Earth’s Giant Selenite

In April 2000, two brothers drilling a tunnel 300 metres beneath a Mexican mountain...

May 29, 2026

  • Mineralogy

Indian Ocean Gravity Hole Explained

The Indian Ocean “Gravity Hole”: How Earth’s Largest Geoid Low Formed

May 28, 2026

  • Geophysics

The Bermuda Anomaly: An Island Floating on a 20-km Raft

New seismic imaging shows Bermuda is held up by a thick slab of cooled...

May 28, 2026

  • Geophysics

Geraisite: Brazil’s First Tektite Strewn Field Discovered

A Stone From the Cerrado

Sometime in 2023, a man in northern Minas...

May 27, 2026

  • Geochemistry

Mount Rainier’s 1507 Lahar Buried a Forest Alive

Introduction

In late summer of 1507, a Douglas-fir stood in what is now...

May 27, 2026

  • Geohazards
  • Volcanology

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