page_title: Jack Hills
hierarchical_section_title: Jack Hills
caption_attribution_description: English: Contrast-enhanced true color satellite image (Landsat 5) of the Jack Hills in Western Australia. The rocks of the Jack Hills are very old (~&#160;3 Billion years) and belong to the so-called Yilgarn Craton. Yet some of these rocks, the Jack Hills conglomerate (actually a metaconglomerate) contain individual grains of zircon which are even older, more than 4 Billion years old. They are used by geoscientists to reconstruct the very early history of the earth.
context_page_description: The Jack Hills are a range of hills in Western Australia. They include the oldest material of terrestrial origin found on Earth. These are zircons which formed about 4.4 billion years ago. The oldest zircon with the most consistent date is closer to 4.35 bya.
  This zircon is part of a population of zircons in the metamorphosed conglomerate. They were deposited about 3.060 bya, which is the age of the youngest detrital zircon in the rock.
  The zircons are used in research on the conditions on Earth in the Hadean eon.
context_section_description: The Jack Hills are a range of hills in Western Australia. They include the oldest material of terrestrial origin found on Earth. These are zircons which formed about 4.4 billion years ago (bya). The oldest zircon with the most consistent date is closer to 4.35 bya.
  This zircon is part of a population of zircons in the metamorphosed conglomerate. They were deposited about 3.060 bya, which is the age of the youngest detrital zircon in the rock. 
  The zircons are used in research on the conditions on Earth in the Hadean eon.
caption: Satellite image
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