{"id":2118,"date":"2026-09-20T01:17:00","date_gmt":"2026-09-19T16:17:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-20-grand-canyon-ancient-orbital-rhythms-en\/"},"modified":"2026-09-20T01:17:00","modified_gmt":"2026-09-19T16:17:00","slug":"2026-09-20-grand-canyon-ancient-orbital-rhythms-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-20-grand-canyon-ancient-orbital-rhythms-en\/","title":{"rendered":"Grand Canyon strata 1.23 billion years old preserve ancient orbital rhythms"},"content":{"rendered":"

2026-09-20 01:17 KST<\/strong><\/p>\n

Published in Nature Geoscience on 18 September 2026, the study correlated repeating layers at Red Canyon and Tapeats Creek. The US National Park Service lists the Hakatai Shale near 1,230 million years old.<\/p>\n

Milankovi\u0107 cycles can change seasonal sunlight and leave repeating sedimentary patterns, turning layered rocks into an imperfect deep-time clock.<\/p>\n

Difference<\/h2>\n

Obliquity-related frequencies and amplitudes were unusual compared with the recent past, possibly reflecting resonance shifts or nonlinear climate response.<\/p>\n

Two sections<\/h2>\n

Matching distant outcrops reduces the chance that a local break or depositional quirk is mistaken for a global rhythm.<\/p>\n

\"Grand
This AI-generated image explains the topic; it is not a photograph of an actual event, observation or field site.<\/figcaption><\/figure>\n

Moon connection<\/h2>\n

Lunar tides alter Earth\u2019s rotation and axial motion over time, so ancient cycle combinations constrain Earth\u2013Moon and planetary-orbit models.<\/p>\n

Limits<\/h2>\n

Sedimentation rates and cycle assignments allow several interpretations. The preferred solution is evidence, not a unique final answer.<\/p>\n

Next check<\/h2>\n

Comparable strata on other continents and tighter radiometric dates must reproduce the pattern. Data and analyses are on Zenodo.<\/p>\n

Primary source and independent checks<\/h2>\n

Nature Geoscience \uc6d0 \ub17c\ubb38<\/a><\/p>\n

\ubbf8\uad6d \uad6d\ub9bd\uacf5\uc6d0\uad00\ub9ac\uccad \uc9c0\uce35 \uc5f0\ub300<\/a><\/p>\n

Zenodo \ubd84\uc11d \uc790\ub8cc<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Repeating beds in the Hakatai Shale indicate that the relative strength of Earth\u2019s obliquity and orbital cycles around 1.23 billion years ago differed from today. This is an inverse interpretation of sediment rhythms and astronomical models, not a direct observation of the ancient sky.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2118","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=2118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}