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Barberton Makhonjwa Mountains

Barberton Makhonjwa Mountains

Situated in north-eastern South Africa, the Barberton Makhonjwa Mountains comprises 40% of the Barberton Greenstone Belt, one of the world’s oldest geological structures. The property represents the best-preserved succession of volcanic and sedimentary rock dating back 3.6 to 3.25 billion years and forms a diverse repository of information on surface conditions, meteorite impacts, volcanism, continent-building processes and the environment of early life.

Description is available under license CC-BY-SA IGO 3.0

Montagnes de Barberton Makhonjwa

Les Montagnes de Barberton Makhonjwa, qui se trouvent au nord-est de l’Afrique du Sud, englobent 40% de la ceinture de roches vertes de Barberton, une des plus anciennes structures géologiques de notre planète. Ce bien représente la succession de roches volcaniques et sédimentaires la mieux préservée datant de 3,6 à 3,25 milliards d’années, et constitue un dépôt diversifié d'informations sur les conditions de surface, les impacts des météorites, le volcanisme, les processus de formation des continents et l'environnement du début de la vie.

Description is available under license CC-BY-SA IGO 3.0

جبال باربيرتون ماكونيا
يشمل هذا الموقع، الموجود شمال شرق جنوب أفريقيا، 40% من مساحة حزام الحجر الأخضر في باربرتون، الذي يعد أحد أقدم التركيبات الجيولوجية في العالم. وتمثّل جبال باربيرتون ماكونيا سلسلة الصخور البركانية والرسوبية التي ما زالت قائمة في أفضل حال منذ 3.5-3.6 مليار سنة، إذ تكوّنت عندما بدأت القارات الأولى بالتشكل على اليابسة الأصلية. ونجد في الموقع ثغرات ناتجة عن سقوط النيازك، إذ تشكلت مباشرة بعد انتهاء فترة "القصف الشديد القمري" (قبل 4.6 – 3.8 مليار عام) وبقيت على وجه الخصوص في حالة جيدة.

source: UNESCO/ERI
Description is available under license CC-BY-SA IGO 3.0

巴伯顿·玛空瓦山脉
该遗产地位于南非东北部,面积占巴伯顿绿岩带的40%,这是世界上最古老的地质结构之一。巴伯顿·玛空瓦山脉代表了历史上保存最完好的火山岩和沉积岩的演替,其历史可追溯至36-25亿年前,当时第一块大陆开始在原始地球上形成。流星撞击后形成的砾岩是这里的特征,这些砾岩是在紧接“重型轰炸”(4.6-3.8亿年前)之后的陨石撞击造成的。

source: UNESCO/ERI
Description is available under license CC-BY-SA IGO 3.0

Горная местность Барбертон, или горы Макхонджва
Этот объект, расположенный на северо-востоке Южной Африки, охватывает 40% зеленокаменного пояса Барбертон, одной из древнейших геологических структур на нашей планете. Горы Барбертон-Макхонджва представляют собой чередование вулканических и осадочных пород, наиболее сохранившиеся из которых датируются периодом от 3,6 до 3,25 млрд. лет назад, в момент начала формирования первых континентов на ранней планете Земля. В этих горах можно обнаружить особенно хорошо сохранившиеся разломы, сформированные ударами метеоритов в результате крупнейшего метеоритного дождя (от 4,6 до 3,8 млрд. лет назад).

source: UNESCO/ERI
Description is available under license CC-BY-SA IGO 3.0

Montes de Barberton Makhonjwa
Este sitio se halla al nordeste de Sudáfrica y engloba el 40% de una de las formaciones geológicas más antiguas del planeta: el cinturón de rocas verdes de Barberton. Los Montes de Barberton Makhonjwa son representativos de la sucesión de rocas volcánicas y sedimentarias mejor preservada del mundo y su edad se remonta a unos 3.600 a 3.250 millones de años atrás, cuando empezaron a formarse los primeros continentes del planeta. En el sitio hay grietas en un buen estado de conservación, formadas inmediatamente después de los impactos ocasionados por el gran bombardeo de meteoritos que se abatió sobre la Tierra en el periodo comprendido entre 4.600 y 3.800 millones de años atrás.

source: UNESCO/ERI
Description is available under license CC-BY-SA IGO 3.0

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Sandspruit River, southern area © Dion Brandt
Outstanding Universal Value

Brief synthesis

The Barberton Makhonjwa Mountains contain an outstanding record of some of the oldest, most diverse, and best-preserved volcanic and sedimentary rocks on the early Earth. These outcrops have been intensively studied for more than a century, and provide key insights into early Earth processes including the formation of continents, surface conditions 3.5 to 3.2 billion years ago, and the environment in which life first appeared on our planet.

Encased by large granite bodies and buried by a thick layer of sedimentary strata, this 340-million-year long record of Archaean lavas and sediments has largely escaped both metamorphism and erosion for all of that time. The geosites provide some of the earliest evidence of the chemical composition of our oceans and atmosphere and of the way continents are formed – all unique attributes of our planet. The Outstanding Universal Value of the property lies in both the remarkable state of preservation of the geosites, their variety, and their close proximity. There are literally hundreds of geosites of interest which, when their information is combined, allow the Barberton Makhonjwa Mountains to tell a richly consistent and as yet only partly explored story of how life on Earth began.

Criterion (viii): The property is a unique remnant of the ancient Earth’s crust, containing among the oldest, and best-preserved sequence of volcanic and sedimentary rocks on Earth. These highly accessible ancient exposures present a continuous 340-million-year sequence of rocks, starting 3 600 million years ago. Their physical, chemical and biological characteristics provide an unparalleled source of scientific information about the early Earth ‒ including the origin of continents, deposits of the hottest lavas ever to flow on Earth, repeated meteorite bombardments, anoxic oceans and atmosphere ‒ that formed the environment in which primitive unicellular life first appeared on our planet. The outstanding value of these rocks lies in the large number of sites and features that, when combined, provide a unique, and as yet only partially explored, scientific resource.

Integrity

The entire 113,137 ha property lies within the Barberton Greenstone Belt and covers some 40% of that geological complex. The property’s boundary encloses a fully representative sample of 154 registered rock outcrops and is configured as a single, contiguous entity representing the key attributes of the property’s Outstanding Universal Value within the context of land use compatible with World Heritage designation. All of the key features of early Earth crustal evolution are represented by world-class geosites that are reasonably undeformed and only very slightly metamorphosed in some cases.

The property does not have a conventional buffer zone and is safeguarded through existing land use zonation as defined in national planning and environmental legislation. Nevertheless, it is important to continually strengthen the enforcement mechanisms for planning and environmental legislation.

Greenstone belts such as Barberton Makhonjwa Mountains host significant proportions of some of the world’s mineral resources; thus, mining will be a threat in any greenstone belt worldwide except the most remote. The level of threat in the property is not high by comparison with other greenstone belts worldwide and is now largely under control due to the relatively high standards of South African environmental law. However, ongoing prospecting demand pressure continues. The threat of mining persists and will require careful monitoring.

Protection and management requirements

The property is well protected by law including the World Heritage Convention Act, 1999 (Act No. 49 of 1999), the National Heritage Resources Act, 1999 (Act No. 25 of 1999), National Environmental Management Protected Areas Act, 2003 (Act No. 57 of 2003), Mpumalanga Tourism and Parks Agency Act, 2005 (No. 5 of 2005), Mpumalanga Nature Conservation Act, 1998 (No. 10 of 1998) and related regulations. The Integrated Management Plan provides a sound framework for management, protection and decision making. The South African World Heritage Convention Committee (SAWHCC) oversees the implementation of the Convention.

Ensuring coordinated and cohesive planning and management across the various parts of the property will require finalization and effective implementation of the proposed Barberton Makhonjwa Mountains Integrated Management Plan as an agreed joint management framework.

Prior to inscription, the State Party committed to increased staffing capacity with specific geoheritage technical capacities. It will be important to maintain and further enhance levels of qualified geoheritage expertise and to better balance planning and management emphasis between biodiversity and geodiversity in light of the property’s Outstanding Universal Value.

Land-owners within the property have signed a resolution committing themselves and their properties to support the proposed World Heritage Site on condition that they are afforded formal representation on all decision-making structures and that their land ownership rights are protected. The sustained cooperation of relevant land-owners will be important to foster and maintain as it is crucial to ongoing protection and ensuring visitor access to key geosites. The geosites are easy to access by researchers and the visiting public in attractive surroundings with a comfortable climate, which supports appreciation of their remarkable geological heritage value.