Harnessing the micro-stratigraphy of pedogenic carbonates, scientists have demonstrated that age determination of fossil soils is possible via uranium-lead dating.
geochronology
Greenland Could Have Records of 3.7-billion-year-old Geomagnetic Fields
Scientists argue that paleomagnetic field tests preserve a geomagnetic field record acquired as chemical remnant magnetization in banded iron formations in southwest Greenland.
Carbon Dating Reveals the Timing of Puerto Rican Cave Art
New dates from cave art pigment add to evidence that Indigenous Puerto Ricans inhabited the island for millennia.
Ultra-High-Resolution Age Model in Clams Yields Daily Paleo-Data
Using geochemical techniques, scientists identify daily cycles in fossilized giant clams, which permits climate reconstructions at the weather timescale.
Paleostorm Chasers Test a New Detection Tool
A method typically used to date sediments shows promise for documenting tropical storms through history—information needed for future projections of storm activity.
Deciphering the History of a Rock’s Crystallization
By combining a phase field function approach with bulk thermodynamics of mineral phases, the thermal history of a rock can now be deciphered from its distribution of mineral phases.
Scotland’s Last Glaciers Cause a Shift in an Old Paradigm
Cosmogenic geochronology of Scotland’s vanished glaciers indicates that the paradigm of weakened North Atlantic currents causing a rapid regional cooling is no longer valid.
The Great Unconformity or Great Unconformities?
Some scientists think the Great Unconformity was caused by Snowball Earth’s glaciations. Recent work suggests these phenomena might not be related.
A Day in the Life Used to Be 17 Hours
The Moon was a lot closer to Earth 2.46 billion years ago, and the shorter distance contributed to shorter days.
研究揭示尼泊尔西部喜马拉雅港湾状地形的形成
研究人员通过热运动学研究发现,沿着板块汇聚界面大型逆冲断层在中下部地壳深处的地壳物质堆叠塑造了高原的生长和区域水系的发育。