The Kimberley Range
The Kimberley Range, or the Kimberleys, in Australia is one of the most remote and geologically interesting regions in the world. In this article we take a deep dive into the region, covering its formation, size, topography, rock types, discovery and mapping, indigenous populations, historic artwork, climate, flora and fauna, as well as the threats it faces and efforts for its preservation. Where and When? The first thing to note about the Kimberley range is just how remote it is. It is found on the very north west tip of the Australian continent. It is part of the state of Western Australia, which at 2,527,013 square kilometers would just edge out Algeria to be the world’s 10th largest country were it to secede from the rest of Australia and go it alone. This vast region contains a population of just 2.8 million people, which would put it at 136 on a list of the most populous countries. For context, Algeria, its nearest neighbour in land area is itself a relatively sparsely populated country, and has a population of 46 million people. The capital of our imaginary new nation of western Australia would be Perth, a city located 1,670 km to the south, containing 2.3 million people of that total. This leaves just half a million people spread throughout the remaining 2.5m kilometers squared. In short, the Kimberleys are remote. The Kimberley Range is also an ancient landscape. It was formed as part of the Kimberley Craton, which began forming 2.5 billion years ago. Today’s surface is likely to have solidified during the Proterozoic Eon, around 1.8 billion years ago. The range was primarily shaped by volcanic activity, tectonic movements, and erosion processes. Since the surface layer solidified, Layers of volcanic rock and sediment have further shaped the landscape. Whilst the region is not directly on a tectonic plate boundary, the Eurasion plate and the Indo-Australian plate run along the southern edge of the lesser Sunda Islands just across the Timor sea. Topology The Kimberley region covers a vast area of about 423,000 square kilometers (163,000 square miles), just a little smaller than the country of Iraq. This makes it one of Australia’s largest wilderness areas. The age of the surface rocks and the relative lack of tectonic activity in the area has allowed time to weather and round the higher peaks of the area, giving the Kimberleys a more gentle and rolling landscape. The highest peaks in the Kimberleys all sit in the Wunaamin Miliwundi Range in the south of the Kimberleys. Mount Broome, which stands at 946 meters (3,104 feet) above sea level, is the region’s highest peak. Rock Types The geology of the Kimberley Range is diverse, featuring a variety of rock types that tell the story of its ancient past. The region is predominantly composed of sandstone, basalt, and granite. The sandstone formations, such as those found in the Bungle Bungles (Purnululu National Park), are particularly notable for their striking beehive-shaped domes. These sandstone structures were formed over millions of years through the deposition of sand, followed by compaction and cementation. Basalt, a type of volcanic rock, is also prominent in the Kimberley. It formed from ancient lava flows that spread across the landscape, creating solidified layers of volcanic rock. Granite outcrops are found throughout the region, formed from slow-cooling magma beneath the Earth’s surface. These granite formations add to the geological complexity and visual diversity of the Kimberley Range. Indigenous Populations The Kimberley region has been inhabited by indigenous peoples for tens of thousands of years. The traditional custodians of the land include several Aboriginal groups, such as the Wunambal, Gaambera, Ngarinyin, and Bunuba peoples. These communities have a profound spiritual and cultural connection to the land, which is reflected in their stories, rituals, and art. Indigenous Australians in the Kimberley have a deep understanding of the land and its resources, developed through generations of living in harmony with their environment. Their knowledge of local flora and fauna, as well as their land management practices, has been crucial for the survival and preservation of the region. Historic Artwork The Kimberley is home to some of the most significant and ancient rock art in the world. Indigenous rock art sites, such as those found in the Bradshaw (Gwion Gwion) and Wandjina styles, provide a perspective on the rich cultural heritage of the region’s Aboriginal peoples. These artworks, some of which are believed to be over 17,000 years old, depict ancestral beings, animals, and human figures, often in intricate and symbolic detail. The Gwion Gwion art is characterized by elegant, elongated human figures adorned with ceremonial dress and accessories. The Wandjina art, on the other hand, features large, stylized human figures with distinctive halo-like headdresses and expressive faces. These artworks are not merely decorative; they hold profound spiritual significance and convey stories, laws, and traditions passed down through generations. European Discovery and Mapping European discovery and mapping of the Kimberley Range began in the early 19th century. The first recorded European to sight the region was William Dampier, an English explorer, who visited the northwestern coast of Australia in 1688 and again in 1699. However, comprehensive exploration and mapping did not occur until the late 19th century. In 1879, Alexander Forrest, an Australian explorer, led an expedition through the Kimberley, documenting the landscape and its potential for settlement. His journey provided valuable insights into the region’s geography and resources. Subsequent expeditions by geologists and surveyors in the early 20th century further mapped the area, uncovering its rich mineral deposits and unique geological features. Climate The Kimberley region experiences a tropical monsoon climate, with distinct wet and dry seasons. The wet season, from November to April, brings heavy rainfall, thunderstorms, and occasional cyclones. This period is crucial for replenishing water sources and sustaining the region’s diverse ecosystems. The dry season, from May to October, is marked by clear skies, warm temperatures, and low humidity. During this time, rivers run dry and water becomes scarce. The contrast between the
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