How do archaeologists use radiocarbon dating
The balls were most likely made by reducing round boulders to a spherical shape through a combination of controlled fracture, pecking, and grinding.The granodiorite from which they are made has been shown to exfoliate in layers when subjected to rapid changes in temperature.Whatever “mystery” exists has more to do with loss of information due to the destruction of the balls and their archaeological contexts than lost continents, ancient astronauts, or transoceanic voyages.Hundreds of stone balls have been documented in Costa Rica, ranging in size from a few centimeters to over two meters in diameter.The balls could have been roughed out through the application of heat (hot coals) and cold (chilled water).
and hundreds more have been found all over the country. Hoopes The stone balls of Costa Rica have been the object of pseudoscientific speculations since the publication of Erich von Däniken’s Chariots of the Gods in 1971.They are hardly a new discovery, nor are they especially mysterious.In fact, archaeological excavations undertaken at sites with stone balls in the 1950s found them to be associated with pottery and other materials typical of the Pre-Columbian cultures of southern Costa Rica.It has been estimated that the largest ones weigh over 16 tons (ca. Almost all of the balls are made of granodiorite, a hard, igneous stone that outcrops in the foothills of the nearby Talamanca range.There are a few examples made of coquina, a hard material similar to limestone that is formed from shell and sand in beach deposits.