2021 Undergraduate Research Showcase

Document Type

Student Presentation

Presentation Date


Faculty Sponsor

Dr. Jen Pierce


Inorganic carbon, or CaCO3, makes up approximately 40% of global carbon in soils in arid and semi-arid regions (Stanbury et al., 2017). As many soil studies often focus on organic carbon, the role of soil inorganic carbon (SIC) and its formation is not well understood. In addition, the source of the calcium in CaCO3 is not well known. Potential sources of calcium in southwest Idaho soils include weathered bedrock and/or aeolian dust, whose provenance is also poorly quantified.

This study uses strontium (87Sr/86Sr) as a calcium proxy to 1) describe the contribution of atmospheric dust to pedogenic carbonates and 2) infer the source of dust in southwestern Idaho.



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