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Polished slab of orthocerid (straight-shelled) nautiloid cephalopod fossils from Morocco. Mining for fossils in Morocco is a labor-intense and delicate process since fossils, intended to be sold as scientific curiosities, or in cases even as natural works of art, have to be retrieved from the ground undamaged.
The Garamantean Road passed south of the desert near Murzuk before turning north to pass between the Alhaggar and Tibesti Mountains before reaching the oasis at Kawar. From Kawar, caravans would pass over the great sand dunes of Bilma, where rock salt was mined in great quantities for trade, before reaching the savanna north of Lake Chad. [14]
The similarities and differences between the Wandering Rocks and the Symplegades has been much debated by scholars, as have potential locations for them. (See also Geography of the Odyssey .) As Scylla and Charybdis have often been located in the Straits of Messina , this has led some (like E. V. Rieu ) to suggest the Wandering Rocks were ...
A model of the subducting Farallon slab under North America. In geology, the slab is a significant constituent of subduction zones. [1] Subduction slabs drive plate tectonics by pulling along the lithosphere to which they attach in a process known as slab pull and by inducing currents in the mantle via slab suction. [2]
The Phoenicians became well known amongst contemporaries as "traders in purple" – a reference to their monopoly over the purple dye extracted from the murex shell. [15] The Phoenicians plied their ships across the Mediterranean, becoming a major trading power by the 9th century BCE. Phoenician merchant traders imported and exported wood ...
A slab-trap is very much alike but more conclusive. Hunting with slabs is a system of hunting by means of a slab-trap. The fundamental part of the device is a slab. Preparing this trap was a delicate task. [7] [13] [14] Preparation of the trap: A slab of suitable dimensions is held in a raised position forming an appropriate angle with the ...
This video shows an artist's impression of the free-floating planet CFBDSIR J214947.2-040308.9.. A rogue planet, also termed a free-floating planet (FFP) or an isolated planetary-mass object (iPMO), is an interstellar object of planetary mass which is not gravitationally bound to any star or brown dwarf.
Slabs are one of the greatest consumers of concrete in many buildings, [14] so reducing the slab mass can make a relatively large difference to the environmental impact of a building's construction. Biaxial slabs may be marginally cheaper than solid slabs, partly due to the lower mass.