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A major marine transgression reach the current Jordan River. Marl and siliceous rocks deposited during continued transgression in the Albian, Turonian, Santonian, Campanian and Maastrichtian, while continental deposition took place in the Nubo-Arabian Shield in the southeast. The Sirhan Basin, Al Jafr Basin and Al Azraq Wadi all accumulated ...
It is named after the town of Kimberley in South Africa, where the discovery of an 83.5-carat (16.70 g) diamond called the Star of South Africa in 1869 spawned a diamond rush and led to the excavation of the open-pit mine called the Big Hole. Previously, the term kimberlite has been applied to olivine lamproites as Kimberlite II, however this ...
The geology of Africa is varied and complex, and gives rise to the wide variety of landscapes found across the continent. The African continent rests over two main plates. The African Plate , accounting for the whole of north Africa, and the Somali Plate , which accounts for the eastern side of mid and southern Africa. [ 1 ]
It’s a fairly popular tourist attraction, but there are many hidden gems to be found, including Klein Karoo ostrich farm, vintage museums and the Robberg Nature Reserve. ... 4 Best Hidden Gems ...
The second-largest mineral industry in the world is the mineral industry of Africa, which implies large quantities of resources due to Africa being the second largest continent, with 30.37 million square kilometres of land.With a population of 1.4 billion living there, mineral exploration and production constitute significant parts of their economies for many African countries and remain keys ...
This is a list of gemstones, organized by species and types. Minerals. There are over 300 types of minerals that have been used as gemstones. Such as: A–B
Amazonite, also known as amazonstone, [4] is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. [4] [5] [6] Its chemical formula is KAlSi 3 O 8, [1] [7] which is polymorphic to orthoclase.
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