2026-09-21T00:59:39Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/110741 2023-07-11 col_2142_5131 col_2142_14811 col_2142_27685 com_2142_5130 com_2142_9166 com_2142_8903 com_2142_10683

Pauketat, Timothy R Hedman, Kristin M Fort, Matthew Alexander 2021-09-17T02:34:47Z 2021-09-17T02:34:47Z 2023-09-17T02:34:57Z 2021-04-27 2021-05 Radiocarbon reservoir effects (RREs) occur when the 14C activity in a system does not maintain equilibrium with atmospheric 14CO2 activity. Within aquatic systems, old (14C-depleted) carbon may dilute the current carbon pool by soil erosion, decomposition of old botanical and fauna remains, and dissolution of ancient carbonate rocks. Aquatic food webs assimilate the older carbon, and consumers of aquatic foods incorporate older carbon in their tissues. In one of the first papers examining freshwater RREs Lanting and van der Plicht (1998) dated modern fish and shellfish and found reservoir ages of up to 4430 years in canals and 2000 years in rivers in the Netherlands. If such large offsets exist in the American Bottom, then even limited consumption of aquatic resources could lead to offsets of radiocarbon dates of ~200-400 years in humans, dogs and other species. Identifying and assessing the magnitude of any RRE present via calculation of freshwater radiocarbon reservoir offsets (FROs) from the Intcal20 (Reimer et al., 2020) for the American Bottom region will be the first step in correcting for the consumption of aquatic resources with RREs which could affect the apparent radiocarbon age of omnivorous consumers. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-05-01 The student, Matthew Fort, accepted the attached license on 2021-04-26 at 11:29. The student, Matthew Fort, submitted this Thesis for approval on 2021-04-26 at 11:31. This Thesis was approved for publication on 2021-04-27 at 14:00. DSpace SAF Submission Ingestion Package generated from Vireo submission #16547 on 2021-09-16 at 17:05:14 Made available in DSpace on 2021-09-17T02:34:47Z (GMT). No. of bitstreams: 2 FORT-THESIS-2021.pdf: 1395438 bytes, checksum: 030bd556d6a67d99680d598ad974818e (MD5) LICENSE.txt: 4209 bytes, checksum: 42e760f494525a0bce06d63a289082c5 (MD5) Previous issue date: 2021-04-27 Embargo set by: Seth Robbins for item 118584 Lift date: 2023-09-17T02:34:57Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only application/pdf http://hdl.handle.net/2142/110741 en Copyright 2021 Matthew A. Fort Freshwater radiocarbon reservoir effect stable light Isotopes radiocarbon American Bottom Illinois Radiocarbon reservoir effects in the American bottom flood plain of the Mississippi River and adjacent uplands in southern Illinois text Thesis Thesis Anthropology Anthropology University of Illinois at Urbana-Champaign M.A.