{"id":607771,"date":"2026-02-22T09:01:13","date_gmt":"2026-02-22T09:01:13","guid":{"rendered":"https:\/\/www.europesays.com\/us\/607771\/"},"modified":"2026-02-22T09:01:13","modified_gmt":"2026-02-22T09:01:13","slug":"new-study-shows-jordan-valley-site-is-older-than-expected","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/607771\/","title":{"rendered":"New study shows Jordan Valley site is older than expected"},"content":{"rendered":"

Ubeidiya, a prehistoric site in the Jordan Valley<\/a>, has been dated by researchers to be at least 1.9 million years old, according to a new study from the Hebrew University<\/a> of Jerusalem, the University of Haifa, and the University of Tulsa.<\/p>\n

According to a statement released by Hebrew University, researchers used three methods to date the site, challenging the prevailing view that it is between 1.2 and 1.6 million years old.<\/p>\n

The first method, known as cosmogenic isotope burial dating, measures rare isotopes created when cosmic rays strike rocks of the surface. Once the rocks are buried, the isotopes begin to decay \u201cat a predictable rate,\u201d allowing researchers to learn how long they have been underground.<\/p>\n

The second method was done by examining traces of the Earth\u2019s ancient magnetic field preserved in the site\u2019s lake sediments, which \u201clock in the direction of the planet\u2019s magnetic field at that moment,\u201d the statement explained. Researchers then compared them with known magnetic rotations in Earth\u2019s history to create a timeline.<\/p>\n

However, some initial readings suggested the sediment was around 3 million years old, which didn\u2019t match other findings, leading researchers to believe the sediments had been moved and redeposited over thousands of years by natural geological processes.<\/p>\n

\"AA specialized imaging technique reveals mineral layers preserved within a fossilized Melanopsis shell, February 20, 2026. (credit: Perach Nuriel)How did early humans migrate?<\/strong><\/p>\n

The third method used by researchers was uranium-lead<\/a> dating of fossilized freshwater snail shells to \u201cto establish a minimum age for the layers in which the stone tools were discovered.\u201d<\/p>\n

All three methods presented the same answer.<\/p>\n

The new dating also sheds light on how early humans made and carried their tools.<\/p>\n

At Ubeidiya, archaeologists also found two types of stone tools: the simpler Oldowan tradition and the more advanced, carefully crafted Acheulean style, which included hand axes.<\/p>\n

\u201cThe Ubeidiya Formation has long interested researchers because it preserves early evidence of the Acheulean culture, characterized by large bifacial stone tools found in association with rich faunal assemblages, including species of African and Asian origin, some of which are now extinct,\u201d the statement said.<\/p>\n

Based on the findings, researchers estimate that both tool-making traditions were used by different groups of early humans migrating from Africa<\/a> at roughly the same time, rather than one tradition gradually replacing the other.<\/p>\n

The research paper titled \u201cComplex exposure-burial history and Pleistocene sediment recycling in the Dead Sea Rift with implications for the age of the Acheulean site of Ubeidiya\u201d is now available in Quaternary Science Reviews.<\/p>\n

The research paper titled \u201cComplex exposure-burial history and Pleistocene sediment recycling in the Dead Sea Rift with implications for the age of the Acheulean site of Ubeidiya\u201d is now available in Quaternary Science Reviews\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"Ubeidiya, a prehistoric site in the Jordan Valley, has been dated by researchers to be at least 1.9…\n","protected":false},"author":3,"featured_media":607772,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[8],"tags":[7779,128139,261270,2847,261269,159,67,132,68],"class_list":["post-607771","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-africa","tag-archaeological-site","tag-archaeological-study","tag-archaeology","tag-jordan-valley","tag-science","tag-united-states","tag-unitedstates","tag-us"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/116113472681082280","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/607771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/comments?post=607771"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/607771\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/607772"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=607771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=607771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=607771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}