Carbon isotopic values of long-chain n-alkane increase with elevation.
Hydrogen isotopic values of the alkane decrease with elevation.
Carbon isotopic values of long-chain n-alkane decease with depth in soils.
To use these trend, it can be traced to origin of organic matters in sedimentary rocks with respect to elevation and soil depth.
This article from GCA in 2018 titled “Dual isotope evidence for sedimentary integration of plant wax biomarkers across an Andes-Amazon elevation transect”