Read the passage below:
When volcanologist Dr. Helen Vance published her definitive report on Mount Searing's tephra stratigraphy in 2012, few realized how many years of groundwork had preceded the milestone. Her interest in the island crater was originally sparked back in 2004, when she unexpectedly detected anomalous glass shards while analyzing archived sediment cores in her university laboratory. To prepare for direct field sampling, Dr. Vance secured a specialized micro-X-ray fluorescence spectrometer in 2005. This crucial acquisition allowed her to launch her initial expedition to Mount Searing in 2006. It was not until her 2009 follow-up survey, however, that she collected the basaltic samples that ultimately validated her eruption timeline.
According to the passage, which of the following events occurred FIRST chronologically?
- Dr. Vance analyzed archived sediment cores in her university laboratory.Cevap
- BDr. Vance secured a specialized micro-X-ray fluorescence spectrometer.
- CDr. Vance launched her initial expedition to the Mount Searing crater.
- DDr. Vance collected basaltic samples during a follow-up survey.