To cite package ‘avstrat’ in publications use:

  Loewen M (2026). _avstrat: Tools for Generating Stratigraphic
  Sections_. doi:10.5066/P14PYILN <https://doi.org/10.5066/P14PYILN>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {avstrat: Tools for Generating Stratigraphic Sections},
    version = {0.1.0},
    author = {Matthew Loewen},
    publisher = {U.S. Geological Survey},
    year = {2026},
    doi = {10.5066/P14PYILN},
  }