

It was also known in Coptic as Mountain of Salt ( Coptic: ⲡⲧⲱⲟⲩ ⲙⲡϩⲙⲟⲩ). In Ptolemaic times it constituted part of the Nitrite nome ( Ancient Greek: Νιτριώτης νομός). Natron valley is first attested in the story of the Eloquent Peasant, and it is mentioned among the list of seven oases in the Temple of Edfu. The color of these lakes is reddish blue because its water is saturated with the Natron salt. The Wadi contains 12 lakes, the total surface area of which is 10 km square and their average depth is only 2 m. Therefore, it is true that it is a depression and not a valley, because the region is a closed depression that has a beginning and an end, and it has no source, estuary or tributaries, so the launch of the word "Wadi" on the depression is not topographically correct. The depression is the smallest depression in the Egyptian Western Desert, with an area of about 500 km2. The length of this depression ranges between 5, 55 and 60 km, while its average width is 10 km, and its deepest point reaches 24 meters below sea level. Wadi al-Natrun is the common name for a desert valley located west of the Nile Delta, along the El Tahrir markaz, which is about 10 km west of the entrance to Sadat City on the Cairo-Alexandria Desert Road, and about 50 km from Khattabah on the Nile (Rashid Branch), and it falls below the level of the plateau surface surrounding it about 50 meters. The area is one of the best known sites containing large numbers of fossils of large pre-historic animals in Egypt, and was known for this in the first century AD and probably much earlier. The desertified valley around Scetis in particular may be called the Desert of Scetis. Scetis, now called Wadi El Natrun, is best known today because its ancient monasteries remain in use, unlike Nitria and Kellia which have only archaeological remains. The other two monastic centers are Nitria and Kellia. It is one of the three early Christian monastic centers located in the Nitrian Desert of the northwestern Nile Delta. In Christian literature it is usually known as Scetis ( Σκήτις in Hellenistic Greek) or Skete ( Σκήτη, plural Σκήτες in ecclesiastical Greek). The valley contains several alkaline lakes, natron-rich salt deposits, salt marshes and freshwater marshes. Wadi El Natrun ( Arabic: وادي النطرون "Valley of Natron" Coptic: Ϣⲓϩⲏⲧ Šihēt, "measure of the hearts" ) is a depression in northern Egypt that is located 23 m (75 ft) below sea level and 38 m (125 ft) below the Nile River level.
