This disparity between dates determined by different dating methods and the large spread of TCN ages suggests that the cobbles and boulders have considerable inherited Be concentrations, suggesting that the clasts have been derived from older shorelines or associated landforms.These results highlight the problems associated with using surface cobbles and boulders to date Quaternary surfaces in Death Valley and emphasizes the need to combine multiple, different dating methods to accurately date landforms in similar dryland regions elsewhere in the world.However, these results highlight the potential to use TCN methods, when used in combination with other dating techniques, to examine and quantify processes such as sediment transfer and denudation in drylands.
Epicurus - Greek philosopher; founded the system known as Epicureanism.
It would have been of comparable size by surface area to some of the largest freshwater lakes on Earth today, such as Lake Baikal in Siberia, Lake Michigan in the US and Lake Tanganyika in East Africa.
Heraclitus - Greek philosopher; first of the Greeks to develop a theory of the human soul; he praised its creative resources and spoke of the importance of self-exploration; he spoke of the logos that is common to all and said that the universe is ruled by logos; he always urged that close attention be given to the polarites and concealed structures emodied in language.
There is also widespread evidence that a very large freshwater lake once filled the White Nile River valley “In 2010, prehistoric megalake was discovered beneath Sahara Desert.
Formed some 250,000 years ago when the Nile River pushed through a low channel near Wadi Tushka, it flooded the eastern Sahara, creating a lake that at its highest level covered more than 42,000 square miles,” reported Smithsonian Science.
Democritus of Abdera - Greek philosopher; pupil of Leucippus; developed atomic theory; elaborated idea that matter consisted of atoms having physical size and shape which constantly moved in a void and interacted in different ways; Greek word atoma means indivisible.