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craters

Bull’s-eye features in rock
Posted inNews

Ejecta Discovered Near Site of Ancient Meteorite Impact

Katherine Kornei, Science Writer by Katherine Kornei 17 August 20218 April 2022

South Africa’s Vredefort impact structure is the largest on the planet, and researchers have now discovered the first proximal ejecta possibly deriving from the cataclysmic impact.

A lump of glass
Posted inNews

Glassy Nodules Pinpoint a Meteorite Impact

Katherine Kornei, Science Writer by Katherine Kornei 5 August 20215 May 2022

Researchers working in Chile’s Atacama Desert have collected thousands of “atacamaites” that suggest a meteorite struck the region roughly 8 million years ago.

Map of thorium concentrations across the South Pole–Aitken Basin on the Moon’s farside
Posted inResearch Spotlights

Moon’s Largest Crater Holds Clues About Early Lunar Mantle

by Elizabeth Thompson 12 February 202128 January 2022

An ancient impact splashed evidence of the Moon’s early mantle makeup onto its surface. Now researchers are piecing together models, maps, and samples to bring these mysteries to light.

A view of Sunset Crater, one of many scoria cones in the San Francisco volcanic fields spanning northern Arizona
Posted inNews

Ancient Eruption May Change Our Understanding of Modern Volcanoes

Mara Johnson-Groh, Science Writer by Mara Johnson-Groh 5 February 202112 April 2022

Bubbles trapped in magma from a 1,000-year-old event reveal how scoria cones might erupt and what impact they may have on the landscape and atmosphere.

St. George's Church, Nördlingen, surrounded by red roofs.
Posted inNews

An Asteroid “Double Disaster” Struck Germany in the Miocene

Katherine Kornei, Science Writer by Katherine Kornei 27 January 202126 January 2023

By analyzing sediments jostled by ground shaking, researchers have shown that two impact craters near Stuttgart were created by independent asteroid impacts rather than a binary asteroid strike.

Plot showing a crater produced by the impact of a 10 km diameter bolide impacting a model of (16) Psyche
Posted inEditors' Highlights

Predicting the Unique Shape of Craters on Asteroid (16) Psyche

by Laurent G. J. Montési 21 December 202015 February 2022

Models link the variety of crater shapes expected on (16) Psyche with the interior structure of this unique asteroid, in preparation for the arrival of the Psyche probe in 2026.

A color mosaic close-up of the pockmarked surface of a crescent Moon
Posted inResearch Spotlights

Moon May Hold Billions of Tons of Subterranean Ice at Its Poles

by J. Pinson 20 November 202028 January 2022

By modeling over 4 billion years of the Moon’s impact history, scientists estimate that the lunar poles may harbor billions of metric tons of subsurface ice.

Photographs of two different locations on the surface of Mars showing a small impact crater (top) and a similarly sized hollow (bottom)
Posted inEditors' Highlights

Self-Repairing Blemishes on the Surface of Mars

by B. J. Thomson 18 August 20206 March 2023

A new study of small impact craters at Mars landing sites suggests that active processes degrade and infill depressions at similar rates in locations separated by thousands of kilometers.

Map of the Gusev Crater region of Mars with craters detected by an algorithm shown in red
Posted inEditors' Highlights

Who Wants to Count All the Craters on Mars? Not Me!

by P. Fox 21 July 202028 January 2022

Humans found hundreds of thousands of craters on Mars greater than 1 kilometer in diameter, but now computers automate the process delivering crater counts as well as geologically meaningful ages.

Drill rig in water
Posted inNews

Chicxulub Impact Crater Hosted a Long-Lived Hydrothermal System

Katherine Kornei, Science Writer by Katherine Kornei 30 June 20207 March 2022

Chemical and mineralogical evidence of fluid flow—potentially conducive to microscopic life—was revealed in rock cores extracted from the crater’s “peak ring.”

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