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Siwa is an oasis located in Egypt, about 50 km (30 mi) east of the Libyan border, in the eastern part of the Great Sand Sea or Egyptian Sand Sea. Although well-known to the Tuareg and traders who traveled with caravans across the Sahara , Friedrich Gerhard Rohlfs was the first European to document the Great Sand Sea.
The Great Sand Sea is a desert in the Sahara between western Egypt and eastern Libya in North Africa, 74% of the area is covered by sand dunes. The Great Sand Sea stretches about 650 km (400 mi) from north to south and 300 km (190 mi) from east to west. On satellite images this desert shows a pattern of long sand ridges running in a roughly ...
The World Ocean. For example, the Law of the Sea states that all of the World Ocean is "sea", [8] [9] [10] [b] and this is also common usage for "the sea". Any large body of water with "Sea" in the name, including lakes. River – a narrow strip of water that flows over land from a higher elevation to a lower one
However, it does not include lake or river boundaries. "Potential" maritime boundaries are included; that is, the lack of a treaty or other agreement defining the exact location of the maritime boundary does not exclude the boundary from the list. In numbering maritime boundaries, three separate figures are included for each country and territory.
Land borders and maritime boundaries are included and are tabulated separately and in combination. For purposes of this list, "maritime boundary" includes boundaries that are recognized by the United Nations Convention on the Law of the Sea, which includes boundaries of territorial waters, contiguous zones, and exclusive economic zones.
Both the regional extent of their sand cover and the complexity and great size of their dunes distinguish ergs from dune fields. The depth of sand in ergs varies widely around the world, ranging from only a few centimeters deep in the Selima Sand Sheet of Southern Egypt, to approximately 1 m (3.3 ft) in the Simpson Desert, and 21–43 m (69 ...
A wide range of mammals also live in Great Sand Dunes, including American pika, kangaroo rats, bighorn sheep, mountain lions, black bears, elk and Abert’s squirrels, which the park says are ...
The borders of the oceans are the limits of Earth's oceanic waters.The definition and number of oceans can vary depending on the adopted criteria. The principal divisions (in descending order of area) of the five oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern (Antarctic) Ocean, and Arctic Ocean.