Read the following passage.
In the mid-twentieth century, the advent of radiocarbon dating revolutionized archaeology by providing a method to determine the absolute age of organic materials. However, early radiocarbon dates often contained systematic errors because the initial method assumed that the concentration of carbon-14 in the atmosphere had remained constant over time. This assumption was later proven false. The breakthrough in correcting these errors came through the application of dendrochronology, or tree-ring dating, specifically utilizing the exceptionally long-lived bristlecone pines of the American Southwest.
Because bristlecone pines can live for several millennia, and their dead wood decays extremely slowly in the arid, high-altitude environment, researchers could construct a continuous tree-ring sequence stretching back nearly 10,000 years. Each tree ring represents a single year of growth, and the wood in that ring captures the carbon-14 ratio present in the atmosphere during that specific year. By radiocarbon dating wood samples whose exact age was already known from the tree-ring count, scientists could compare the radiocarbon age to the true calendar age. This comparison revealed that historical atmospheric carbon-14 levels had fluctuated significantly, primarily due to variations in solar activity and the Earth's magnetic field.
Consequently, archaeologists were forced to calibrate their previous radiocarbon dates, often pushing back the dates of significant prehistoric events, such as the construction of megalithic tombs in Western Europe, by many centuries. This calibration effectively severed the previously assumed diffusionist link between the ancient Near East and early European cultures, establishing that European megalithic architecture developed independently.
Based on the passage, match each explicit textual assertion to the specific inference that can be most logically drawn from it.
- The calibration effectively severed the previously assumed diffusionist link between the ancient Near East and early European cultures.Prior to bristlecone pine calibration, many archaeologists hypothesized that architectural innovations spread from the Near East to Western Europe.
- Early radiocarbon dates often contained systematic errors because the initial method assumed that the concentration of carbon-14 in the atmosphere had remained constant.Fluctuations in atmospheric carbon-14 complicate the process of determining an artifact's absolute age when relying solely on early, uncalibrated radiocarbon dating methods.
- Because bristlecone pines can live for several millennia, and their dead wood decays extremely slowly, researchers could construct a continuous tree-ring sequence stretching back nearly 10,000 years.It is possible for scientists to extract and study the physical wood of a bristlecone pine tree that perished several thousand years ago.