This amazing natural formation was first noticed by Italian mineralogist Vincenzo de Michele in 2008. He discovered it with Google Earth application while looking for man made landmarks from Neolithic Age in this remote part of desert.
In fact this (currently) empty land was inhabited in Neolithic. Only some 5 300 years people were forced to find another way of life due to advancing desert – and, it is possible, this crisis initiated the development of the great Egyptian civilization. But this is another story.
Scientists were quick – already in February 2009 there was organized the first joint Italian – Egyptian expedition to the crater. Next expedition followed in February 2010 and then the results of geophysical research testified – this is impact crater indeed.
The impact crater was named after the the 65 km distant Gebel Kamil (Djebel Kamil) mountain – Kamil crater.
The only ejecta rays on Earth?
This crater is small – width is only 44.8 m, full depth – 15.8 m. Now the crater is partly filled with sand.
One feature makes this crater unique: a rayed structure around the crater is visible. These are ejecta rays, left by the meteorite explosion. While such ejecta rays are common on Moon or planets with a thin layer of atmosphere, on Earth these rays are quickly erased by erosion.
It is possible that Kamil crater is the only impact crater on Earth with such ejecta rays thanks to the very dry climate in desert.
Exact age of crater is not known, but scientists estimate that it is younger than 5000 years – may be just three – two thousand years.
It was created by approximately 1.3 m wide iron meteorite, falling obliquely. Weight of this iron piece was some 5 – 10 tonnes and it fell with a speed of some 11 – 12 km per second.
According to earlier calculations such meteorites in atmosphere should divide in smaller pieces and melt – and in most cases they do. But there are cases when such meteorites behave like bullets and hit the ground with terrible force.
This happened in a case of Kamil meteorite. Although it was as large as a fridge, it smashed the hard sandstone and created a hole large enough to hide a large house in it.
The hit smashed the meteorite into thousands of pieces. Thus far have been found pieces with a total mass of 1,600 kg, the largest is 83 kg heavy. Most are located in Egyptian Geological Museum in Cairo, but some were brought to universities in Pisa and Siena, Italy.
This iron meteorite has ataxitic structure – e.g. it does not have the amazing Widmanstätten pattern which characteristic for many other iron meteorites. The meteorite mass though has inclusions of schreibersite, troilite and daubréelite crystals – all are rare minerals which are found only in meteorites.
- L. Folco, M. Di Martino, A. El Barkooky, M. D’Orazio, A. Lethy, S. Urbini, I. Nicolosi, M. Hafez, C. Cordier, M. van Ginneken, A. Zeoli, A.M. Radwan, S. El Khrepy, M. El Gabry, M. Gomaa, A.A. Barakat, R. Serra and M. El Sharkawi. Kamil Crater (Egypt): Ground truth for small-scale meteorite impacts on Earth. Geology, January 5, 2011.
|Coordinates:||22.0183 N 26.0877 E|
|Address:||Africa, Egypt, New Valley governorate, eastern part of Uweinat Desert, 0.6 km from the border of Sudan and 112 km from the border of Libya|
|Visible depth:||8 m|
|Full depth:||15.8 m|
|Age:||less than 5 000 years|
Egypt is home to many of the most important and impressive archaeological monuments in the world. Here, in the valley of Nile developed one of the first and greatest civilization – Ancient Egypt (3150 – 332 BC), leaving countless larger and smaller monuments.
The powerful roots of Egyptian civilization though go deeper in the past and last up to this day – there are numerous interesting prehistoric monuments and even more Roman, Christian and Islamic landmarks, e.g. the oldest Christian monasteries in the world (Paromeos Monastery, Saint Catherine’s Monastery, Monastery of Saint Anthony and many others).
There are many pieces of solid matter flying around in the space. And VERY frequently they fall on the surface of Earth. There are estimates that every year on Earth fall 18,000 – 84,000 meteorites larger than 10 grams: e.g. one meteorite every 6 – 30 minutes.
This category includes outstanding impact craters – detectable scars on the surface of Earth left by a body coming from outer space. Category includes also meteorites – natural objects from the outer space.