{"id":2072,"date":"2026-09-15T01:15:00","date_gmt":"2026-09-14T16:15:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-15-andes-buried-landscape-en\/"},"modified":"2026-09-15T01:15:00","modified_gmt":"2026-09-14T16:15:00","slug":"2026-09-15-andes-buried-landscape-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-15-andes-buried-landscape-en\/","title":{"rendered":"A giant Andean volcanic sheet preserved the outline of a 21.9-million-year-old landscape"},"content":{"rendered":"

2026-09-15 01:15 KST<\/strong><\/p>\n

An eruption from the Lauca Caldera about 21.9 million years ago covered a huge region with ignimbrite up to 1 km thick. Its present shape let researchers infer the landscape below and a long-term uplift limit.<\/p>\n

\u201cPompeii of the Andes\u201d is an analogy for preservation. The result comes from river-and-uplift modelling, not direct images of a buried city or ecosystem.<\/p>\n

Scale<\/h2>\n

The deposit covers about six times Santiago\u2019s area and nearly three times Greater London, shielding underlying relief from later erosion.<\/p>\n

Method<\/h2>\n

Hundreds of candidate landscapes were generated by varying river incision and uplift. Only relatively low-relief foothills could fit beneath the observed sheet.<\/p>\n

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

Rate<\/h2>\n

The compatible terrain limited rock uplift to 0.26 km per million years, about 2.5 cm per century. This is a long-term upper bound, not uniform GPS motion.<\/p>\n

Importance<\/h2>\n

The result supports slow, steady central-Andes growth over a sudden rise in only the last 6\u201310 million years, but it cannot settle every region or time interval.<\/p>\n

Next<\/h2>\n

Apply the method to other giant deposits and compare with drilling, geophysics and mineral cooling records to test assumptions.<\/p>\n

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

Science Advances \uc6d0 \ub17c\ubb38 \uc11c\uc9c0<\/a><\/p>\n

\ud504\ub791\uc2a4\uc5b4 \ub3c5\ub9bd \ud655\uc778<\/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":"

Inverting the shape of a northern Chile ignimbrite suggests the pre-eruption terrain was gentle and rock uplift no faster than 0.26 km per million years. Researchers did not excavate the buried surface or find a city.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2072","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2072","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=2072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}