Dr. Fred J. Calef III
@mapperwocky.bsky.social
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Science Systems Engineer @NASA/JPL-Caltech. PhD in Geology. 30+ years Geospatial experience. PI for the FOSS4G Multi-Mission Geographic Information System (MMGIS https://github.com/NASA-AMMOS/MMGIS).
Not a NASA account.
Never met a rock I wouldn’t lick.
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Reposted by Dr. Fred J. Calef III
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Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Science Blog
@scienceblog.com
· 19h
Geologists Find Proto Earth Fingerprints In Ancient Rocks
A tiny wobble in potassium is rewriting Earth’s origin story. In new work published today in Nature Geosciences, an MIT-led team reports a subtle deficit of potassium-40 in some of the planet’s oldest and deepest rocks, a chemical quirk that points to preserved fragments of the 4.5-billion-year-old proto Earth. Why this matters: for decades, scientists assumed the Moon-forming giant impact melted and mixed Earth so thoroughly that any primordial signature vanished.
scienceblog.com
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III
Reposted by Dr. Fred J. Calef III