TOEFL Listening: TPO-TOEFL听力TPO - 41KL5_1O48662SQ0R$

In the talk, the professor describes the sequence of uranium-lead dating. Summarize the sequence by putting the events in the correct order. A. Zircon in the sandstone is matched to the zircon in a particular mountain range. B. The amount of lead in sandstone zircon is measured. C. The age of zircon in a sandstone sample is determined.