Ratio clock Quartz rich sediment in a cave in the Sierras is measured to have a 26 Al 10 Be ratio of 2 8, and the 10 Be concentration is 2 2x10 4 at gm qtz i) What is the age of the deposit (and hence the age of the void in which they are found) ii) Calculate the inherited concentration upon deposi...

i We must solve the exponential decay function representing the decli ...

Ratio clock. Quartz-rich sediment in a cave in the Sierras is measured to have a 26 Al/

Question:

Ratio clock. Quartz-rich sediment in a cave in the Sierras is measured to have a ²⁶Al/¹⁰Be ratio of 2.8, and the ¹⁰Be concentration is 2.2x10⁴ at/gm-qtz.

i) What is the age of the deposit (and hence the age of the void in which they are found)?

ii) Calculate the inherited concentration upon deposition, and estimate the basin-average erosion rate in the catchment, having calculated that the average production rate in the catchment is 35 at/gm-qtz-yr.

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