Lake sediment core

Detailed Description
The past ~10,000 years of lake sediment, 350cm in length, was used to construct a decade-to-century isotope record that was compared with the 20-year annual tree-ring record.
Sources/Usage
Published in Geology by the Geological Society of America under the STM Permission Guidelines (2024). Their copyright page describes acceptable use (see uploaded PDFs) including this statement: "Works prepared by U.S. government employees in the course of their work are in the public domain, however, and are not copyrighted."