What does this research mean for the field?

The hearth feature at site 5EP6618 was used during the Middle Archaic period, as indicated by radiocarbon dating of charcoal samples. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to investigate an isolated hearth/thermal feature at site 5EP6618 through various analyses.

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March 7, 2026Open Access

Pollen, Macrofloral, and Organic Residue (Ftir) Analysis of Sample From 5ep6618, Colorado

Key Points

This research aims to investigate an isolated hearth/thermal feature at site 5EP6618 through various analyses.
Conducted radiocarbon dating on charcoal from the site
Performed Fourier transform infrared spectroscopy (FTIR) on sediment samples
Analyzed pollen and macrofloral content from separate sediment samples
Radiocarbon dates indicate feature use during the Middle Archaic period
FTIR analysis provided insights into organic residues
Pollen and macrofloral analysis contributed to understanding past environmental conditions

Abstract

Site 5EP6618 is located within the Colorado Piedmont of the Great Plains physiographic region on Fort Carson’s Training Area 13. This isolated hearth/thermal feature was discovered in a large soil column that had eroded out of the cut bank of a seasonal arroyo. Radiocarbon dates from two separate pieces of charcoal recovered from the feature yielded uncalibrated dates of 3590 ± 25 BP and 3690 ± 30 BP, indicating use of this feature within the Middle Archaic period. Two sediment samples (1 and 2) were submitted for Fourier transform infrared spectroscopy (FTIR). One sample (3) was submitted for pollen analysis, and one sample (4) for macrofloral analysis.

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