{"id":7026,"date":"2026-11-05T10:27:43","date_gmt":"2026-11-05T15:27:43","guid":{"rendered":"https:\/\/canasanta.ca\/?p=7026"},"modified":"2026-11-05T10:27:43","modified_gmt":"2026-11-05T15:27:43","slug":"cueva-africana-kromdraai-revela-edad","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/historia\/cueva-africana-kromdraai-revela-edad\/","title":{"rendered":"UNA CUEVA AFRICANA REVELA SU EDAD"},"content":{"rendered":"<p style=\"margin-bottom:26px;line-height:1.75\">Durante d\u00e9cadas, la cueva sudafricana de <strong>Kromdraai<\/strong> ha ocupado un lugar fundamental en la historia de nuestros antepasados. All\u00ed aparecieron f\u00f3siles que ayudaron a reconocer a <em>Paranthropus robustus<\/em>, un antiguo pariente humano de poderosa mand\u00edbula. Sin embargo, el yacimiento conservaba una dificultad decisiva: faltaba una dataci\u00f3n absoluta fiable para una de sus principales acumulaciones de sedimentos fosil\u00edferos.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">Un estudio publicado el <strong>30 de octubre de 2026<\/strong> en la revista cient\u00edfica <em>npj Heritage Science<\/em> aporta ahora un marco cronol\u00f3gico mediante el an\u00e1lisis de uranio y plomo. El equipo sit\u00faa la formaci\u00f3n de un bloque clave de brecha entre edades estimadas de aproximadamente <strong>1,94 y 2,67 millones de a\u00f1os<\/strong>, con incertidumbres espec\u00edficas para cada estimaci\u00f3n. No significa que todos los f\u00f3siles de Kromdraai tengan exactamente esas edades: el trabajo fecha materiales minerales asociados al dep\u00f3sito y establece l\u00edmites que deber\u00e1n interpretarse con cautela.<\/p>\n<h2>UNA CUEVA FUNDAMENTAL PARA ENTENDER LA EVOLUCI\u00d3N<\/h2>\n<p style=\"margin-bottom:26px;line-height:1.75\">Kromdraai se encuentra en la provincia de Gauteng, dentro del paisaje sudafricano reconocido por la UNESCO como la <strong>Cuna de la Humanidad<\/strong>. La regi\u00f3n re\u00fane numerosos yacimientos donde se han conservado vestigios de diferentes homininos. Sus cuevas funcionaron como trampas naturales y como lugares donde se acumularon sedimentos, huesos y fragmentos de roca durante largos periodos.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">Entre los hallazgos hist\u00f3ricos del lugar destaca el ejemplar de referencia de <em>Paranthropus robustus<\/em>, una especie que no pertenece a nuestra l\u00ednea humana directa conocida. Su anatom\u00eda dental y mandibular revela una combinaci\u00f3n singular de adaptaciones alimentarias, pero todav\u00eda existen preguntas sobre cu\u00e1ndo vivi\u00f3 cada poblaci\u00f3n y c\u00f3mo coincidi\u00f3 con otros homininos del sur de \u00c1frica.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">Para reconstruir esas relaciones no basta con identificar una mand\u00edbula o una pieza dental. Los investigadores necesitan saber cu\u00e1ndo se formaron los dep\u00f3sitos que contienen los restos y si diferentes capas corresponden a episodios separados. La antig\u00fcedad de un mineral no equivale autom\u00e1ticamente a la del f\u00f3sil cercano; esa relaci\u00f3n exige estudiar la historia geol\u00f3gica del conjunto.<\/p>\n<h2>EL RELOJ ESCONDIDO EN LA PIEDRA<\/h2>\n<p style=\"margin-bottom:26px;line-height:1.75\">La nueva investigaci\u00f3n fue encabezada por <strong>Ruy Fernandez<\/strong> y <strong>Jos\u00e9 Braga<\/strong>, junto con especialistas de instituciones francesas y sudafricanas. Su equipo utiliz\u00f3 la geocronolog\u00eda de <strong>uranio-plomo<\/strong>, basada en la transformaci\u00f3n radiactiva del uranio en is\u00f3topos de plomo a lo largo del tiempo. Cuando las condiciones geol\u00f3gicas son adecuadas, la proporci\u00f3n entre esos elementos permite estimar cu\u00e1ndo cristalizaron determinados minerales.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">El m\u00e9todo se aplic\u00f3 a un bloque de brecha, una roca compuesta por fragmentos cementados, asociado a la historia de la cueva. Las formaciones calc\u00e1reas pueden conservar se\u00f1ales qu\u00edmicas que ayudan a ordenar los episodios de acumulaci\u00f3n y cementaci\u00f3n. Sin embargo, los resultados dependen de c\u00f3mo se comportaron los elementos qu\u00edmicos y de si los datos isot\u00f3picos se ajustan correctamente a los modelos matem\u00e1ticos.<\/p>\n<figure style='float:left;width:45%;max-width:450px;margin:10px 24px 24px 0;border:1px solid #ddd;padding:7px;background:#fafafa'><img data-recalc-dims=\"1\" src=\"https:\/\/i0.wp.com\/canasanta.ca\/wp-content\/uploads\/2026\/11\/Formaciones-calcareas-%E2%80%94-fotografia-de-contexto.jpg?w=800&#038;quality=82&#038;strip=all&#038;ssl=1\" alt='Formaciones rocosas de una cueva, fotograf\u00eda ilustrativa ajena al yacimiento sudafricano' style='width:100%;height:auto;display:block'\/><figcaption style='font:12px\/1.5 Arial,sans-serif;color:#888;margin-top:7px'>Formaciones calc\u00e1reas en una cueva europea. Fotograf\u00eda de contexto, no tomada en Kromdraai. Foto: Yurii Hetsko \/ Unsplash.<\/figcaption><\/figure>\n<p style=\"margin-bottom:26px;line-height:1.75\">Por eso los autores no se limitaron a una sola forma de calcular las edades. Compararon distintos enfoques estad\u00edsticos para evaluar qu\u00e9 modelo describ\u00eda mejor cada conjunto de mediciones. El intervalo resultante constituye una referencia inicial importante, aunque sus m\u00e1rgenes de error impiden reducir la historia del dep\u00f3sito a una fecha \u00fanica e indiscutible.<\/p>\n<h2>POR QU\u00c9 IMPORTAN MILLONES DE A\u00d1OS<\/h2>\n<p style=\"margin-bottom:26px;line-height:1.75\">En evoluci\u00f3n humana, una diferencia de cientos de miles de a\u00f1os puede cambiar la interpretaci\u00f3n de un f\u00f3sil. Permite comparar poblaciones, examinar transformaciones anat\u00f3micas y situar posibles encuentros entre especies en un contexto ambiental concreto. Tambi\u00e9n ayuda a contrastar los restos de Kromdraai con los de otros yacimientos cercanos cuya cronolog\u00eda se ha estudiado mediante t\u00e9cnicas independientes.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">La investigaci\u00f3n no anuncia una especie nueva ni demuestra una relaci\u00f3n de parentesco in\u00e9dita. Su contribuci\u00f3n consiste en mejorar el calendario geol\u00f3gico de un lugar conocido desde hace generaciones. Esa precisi\u00f3n puede parecer menos espectacular que el descubrimiento de un cr\u00e1neo completo, pero sin fechas fiables resulta mucho m\u00e1s dif\u00edcil ordenar las piezas de la historia humana.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">El trabajo tambi\u00e9n plantea una advertencia metodol\u00f3gica. Un resultado isot\u00f3pico aparentemente preciso puede inducir a error si el modelo estad\u00edstico utilizado no representa adecuadamente los datos. Los autores proponen adaptar la interpretaci\u00f3n a cada formaci\u00f3n mineral y comprobar la calidad del ajuste antes de presentar una edad como definitiva.<\/p>\n<h2>LO QUE TODAV\u00cdA FALTA POR DESCUBRIR<\/h2>\n<p style=\"margin-bottom:26px;line-height:1.75\">Las edades obtenidas corresponden a un bloque estudiado, no a toda la secuencia arqueol\u00f3gica de Kromdraai. Ser\u00e1 necesario extender las mediciones, integrar la estratigraf\u00eda y comparar los resultados con la posici\u00f3n exacta de los f\u00f3siles. Solo entonces podr\u00e1 construirse una cronolog\u00eda m\u00e1s completa de los diferentes episodios de ocupaci\u00f3n y acumulaci\u00f3n.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">El estudio recuerda que la evoluci\u00f3n humana se reconstruye mediante disciplinas que trabajan juntas: paleontolog\u00eda, arqueolog\u00eda, geolog\u00eda y qu\u00edmica isot\u00f3pica. Una roca aparentemente ordinaria puede conservar una se\u00f1al temporal que los huesos, por s\u00ed solos, no ofrecen.<\/p>\n<p style=\"margin-bottom:26px;line-height:1.75\">En Kromdraai, el pasado no ha cambiado, pero los instrumentos para leerlo s\u00ed. Las nuevas fechas no resuelven todos los enigmas de nuestros antiguos parientes africanos; proporcionan una base m\u00e1s s\u00f3lida para formular las pr\u00f3ximas preguntas.<\/p>","protected":false},"excerpt":{"rendered":"<p>Un estudio de Kromdraai, en Sud\u00e1frica, establece nuevas edades para rocas asociadas a uno de los grandes yacimientos de la evoluci\u00f3n humana.<\/p>","protected":false},"author":284226809,"featured_media":7024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[33205457,33205478,3503],"tags":[33208184,33208622,33208623,33208625],"class_list":["post-7026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-arqueologia","category-historia","tag-evolucion-humana","tag-kromdraai","tag-paranthropus-robustus","tag-sudafrica"],"acf":{"introduccion":"","fuentes_y_referencias":"Fernandez, R., Braga, J., Blichert-Toft, J. et al. (2026). First U-Pb dating of Kromdraai cave in the Cradle of Humankind UNESCO World Heritage Site. npj Heritage Science. https:\/\/doi.org\/10.1038\/s40494-026-03075-5","autor":748},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>UNA CUEVA AFRICANA REVELA SU EDAD - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Kromdraai, en Sud\u00e1frica, obtiene nuevas fechas de entre 1,94 y 2,67 millones de a\u00f1os para rocas relacionadas con la evoluci\u00f3n humana.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/canasanta.ca\/en\/history\/cueva-africana-kromdraai-revela-edad\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"UNA CUEVA AFRICANA REVELA 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