Geology News | Sci.News

Miassite is one of only four minerals found in nature that act as a superconductor when grown in the lab and the only mineral known so far that reveals unconventional superconductivity in its clean synthetic form. Image credit: Paul Canfield.

Physicists Identify First Unconventional Superconductor with Composition Also Found in Nature

Mar 13, 2024 by News Staff

Solid state chemistry has produced a plethora of materials with properties not found in nature. For example, high-temperature superconductivity in copper-oxide...

An artist’s impression of the ‘Snowball Earth.’ Image credit: Oleg Kuznetsov, http://3depix.com / CC BY-SA 4.0.

Low Volcanic Carbon Dioxide Emissions Triggered Sturtian ‘Snowball Earth’ Glaciation: Study

Feb 8, 2024 by News Staff

The Sturtian ‘Snowball Earth’ glaciation (717 to 661 million years ago) is regarded as the most extreme interval of icehouse climate in Earth’s history....

Kim et al. suggest that chemical exchange between the core and mantle over gigayears of deep transport of water may have contributed to the formation of the putative E’ layer. Image credit: Yonsei University.

Surface Water Penetrates Deep into Earth, New Research Suggests

Nov 14, 2023 by News Staff

A few decades ago, seismologists identified a thin layer with a lower velocity in Earth’s metallic liquid core. The origin of this layer, known as the...

Yuan et al. suggest that LLVPs are remnants of the ancient protoplanet Theia that violently collided with Earth billions of years ago in the same giant impact that created our Moon. Image credit: Hernán Cañellas.

Two Fragments of Protoplanet Theia Lie Deep within Earth, Geoscientists Say

Nov 1, 2023 by Enrico de Lazaro

A giant collision between the ancient protoplanet Theia and the proto-Earth about 4.5 billion years ago may have formed Earth’s Moon as well as two continent-sized...

3D seismic imaging and ocean drilling at the Hikurangi margin reveal a widespread and previously unknown fluid reservoir within the extensively hydrated (up to 47 vol % water) volcanic upper crust of the subducting Hikurangi Plateau large igneous province. Image credit: Gase et al., doi: 10.1126/sciadv.adh0150.

Geoscientists Discover Massive Undersea Water Reservoir Off New Zealand’s Coast

Oct 4, 2023 by News Staff

Revealed by 3D seismic imaging, the newly-discovered water reservoir lies 3.2 km (2 miles) under the ocean floor off the coast of New Zealand, where it...

Plate tectonic reconstructions showing the position of Argyle within the McArthur-Yanliao Gulf. Image credit: Olierook et al., doi: 10.1038/s41467-023-40904-8.

Australian Pink Diamonds Were Formed when Supercontinent Nuna Was Breaking Up into Fragments

Sep 20, 2023 by News Staff

While it is known that for diamonds to form there needs to be carbon deep in the Earth, and for these diamonds to turn pink they must be subjected to forces...

The New Port Richey fulgurite images and microscopy. Image credit: Bindi et al., doi: 10.1038/s43247-023-00736-2.

Study: Lightning Strikes Can Create Phosphites on Earth’s Surface

Apr 11, 2023 by News Staff

Phosphate minerals such as those in the apatite group tend to be the dominant forms of phosphorus in minerals on the Earth’s surface. Phosphates can...

This sample of the El Ali meteorite contains two new minerals: elaliite and elkinstantonite. Image credit: Nick Gessler / Duke University.

Researchers Find Two Extraterrestrial Minerals in El Ali Meteorite

Dec 27, 2022 by News Staff

The El Ali meteorite, a 15.2-ton iron meteorite found in 2020 near the tiny town of El Ali in Somalia, contains at least two new minerals: elaliite and...

Hand sample of Dresser Formation stromatolite with domical topography (arrowed). Image credit: Hickman-Lewis et al., doi: 10.1130/G50390.1.

3.5-Billion-Year-Old Australian Stromatolites Have Biogenic Origin, New Research Confirms

Nov 7, 2022 by News Staff

Stromatolites are solid, laminar structures reflecting complex interplays between microbial communities and their environment. Hand sample of Dresser Formation...

Images of graphite, lonsdaleite, and diamond in ureilite meteorites: (A) reflected light image showing folded crystalline graphite, with fold morphology defined by graphite cleavage; different shading in the graphite is produced by axial planar kink bands; (B) reflected light image (stacked foci) showing an example of the inherited fold morphology preserved in lonsdaleite; (C) cathodoluminescence map of the same area as (B) indicating different phases of carbon, where the green regions are lonsdaleite and the red areas on the periphery (including the purple dashed circle) are cubic diamond (blue is the cathodoluminescence response from olivine); (D) scanning TEM image of a region cut out of the area indicated by yellow circle in (C), highlighting dark lonsdaleite crystals. Image credit: Tomkins et al., doi: 10.1073/pnas.2208814119.

Strange Meteoritic Diamonds Came from Mantle of Destroyed Dwarf Planet, Study Says

Sep 13, 2022 by News Staff

Lonsdaleite, a rare hexagonal form of diamond found in ureilite meteorites, formed shortly after an inner solar system dwarf planet collided with a large...

Schematic model of fluvial systems both before and after the development of land plants: before the Devonian period, minimal land plants, rapid channel migration and river systems dominated by braided rivers led to rapid sediment transfer, minimal development of mud-sized particles and minor deposition of mudrocks along continental margins; in contrast, after the Devonian, the expansion of vascular land plants led to the development of meandering rivers and the dramatic slowing of sediment transfer to marine environments; the red dashed line represents a generalized sediment transport path that is more sinuous post-Devonian and less sinuous pre-Devonian; these diametric depositional systems influenced the isotopic composition of sediment available for reworking and melting in magmatic systems along destructive plate boundaries. Image credit: Spencer et al., doi: 10.1038/s41561-022-00995-2.

Emergence of Land Plants Altered Composition of Earth’s Continental Crust, Researchers Say

Aug 31, 2022 by News Staff

The evolution of land plants took place about 430 million years ago (Silurian period), when North America and Europe were conjoined in a landmass called...

(A) the Milky Way Galaxy with superimposed spiral arms and geological events: the arm and the Solar System rotate clockwise at different rates; the ‘+’ number denotes the number of times Earth has passed through that arm; (B) model of the Oort cloud showing cometary nuclei; (C) schematic reconstruction of early Earth impact process; (D) early crustal nuclei development. Image credit: NASA / JPL-Caltech / ESO / R. Hurt / Kirkland et al., doi: 10.1130/G50513.1.

Transits through Milky Way’s Spiral Arms Helped Form Early Earth’s Continental Crust, Study Says

Aug 24, 2022 by News Staff

New research led by Curtin University geologists suggests that regions of space with dense interstellar clouds may send more high-energy comets crashing...

An artist’s impression of where an asteroid hit the surface of Mars 5-10 million years ago, ejected NWA 7034 and its transit to the Earth. Image credit: Curtin University.

Planetary Scientists Identify Home Crater of Famous Martian Meteorite

Jul 13, 2022 by Natali Anderson

New research shows that the Martian meteorite Northwest Africa (NWA) 7034, known more commonly as ‘Black Beauty,’ was ejected between 5 and 10 milliom...

Dr. Oliver Warr collecting sample in Moab Khotsong, South Africa. Image credit: Oliver Warr.

1.2-Billion-Year-Old Groundwater System Found in South African Mine

Jul 6, 2022 by News Staff

Geologists have discovered 1.2-billion-year-old groundwater about 3 km below surface in Moab Khotsong, a gold- and uranium-producing mine in South Africa....

Hackmanite turns purple under UV irradiation, and the color fades back to white in a few minutes under regular white light. Image credit: Mika Lastusaari.

Natural Aluminosilicate Minerals Change Color Under UV Light

Jun 22, 2022 by News Staff

Hackmanite, tugtupite, and scapolite change their color from white to purple, pink, and blue, respectively, under UV irradiation, according to a team of...

$A polished section of the Martian meteorite Miller Range (MIL) 03346: (A) photograph of the interior of MIL 03346,230; note the yellow tint in the left region of the sample, marked by dotted lines; mineral grains in the yellow-tinted region are heavily affected by aqueous alteration; (B) BSE image of the same section as in (A); light gray olivine grains, marked with arrows, are situated in the altered areas; the white boxes show locations for detailed images in (C) to (F); (C) BSE image of the upper left olivine grain, marked with a box in (B); iddingsite veins are cutting through a fractured olivine grain; augite grains and a fine-grained mesostasis (dark gray) containing titanomagnetite (bright, skeletal grains) are also shown in the figure; (D) photograph of the upper left olivine grain, same as in (C); iddingsite veins have a dark red color; (E) BSE image showing details of the upper right olivine grain; the grain is fractured and crosscut by iddingsite veins that are predominantly oriented east to west in the image; (F) photograph of the same grain as in (E), where the dark red iddingsite veins have been outlined. Image credit: Martell et al., doi: 10.1126/sciadv.abn3044.$

‹123 4 ›»