In geochemistry, paleoclimatology, and paleoceanography δ13C (pronounced "delta c thirteen") is an isotopic signature, a measure of the ratio of the two...

increases and δ13C values can be as low as −32‰. The δ13C value for animals depends on their diet. An animal that eats food with high δ13C values will have...

An animal that eats food with high δ13C values will have a higher δ13C than one that eats food with lower δ13C values. The animal's own biochemical...

signature of the SPICE event is a positive δ13C excursion, characterized by a 4 to 6 ‰ (per mille) shift in δ13C values within carbonate successions around...

at any one time, δ18O and δ13C preserved in the fossil record can be affected by regional factors. Carboniferous δ18O and δ13C records show regional differences...

87Sr/86Sr and δ13C. Continued erosion of the deeper levels of the Gondwanan mountain belts led to a peak in 87Sr/86Sr and linked positive δ13C and δ34S excursions...

photosynthetic pathway that produces δ13C values averaging about −12.5‰. It follows that eating these different plants will affect the δ13C values in the consumer's...

forms a substantial part of birds' eggshells, and the δ13C of the diet is reflected in the δ13C of the calcite of the shell. The largest documented single...

Douglas J.; Freeman, Katherine H. (September 5, 2018). "Fatty acid specific δ13C values reveal earliest Mediterranean cheese production 7,200 years ago"....

expressed in using delta notation of δ13C ("delta thirteen C"), which is reported in parts per thousand (per mille, ‰). δ13C is defined in relation to the Vienna...

of the earliest examples of biological control. The δ13C of the emu's diet is reflected in the δ13C of the calcite of its egg shell. Small stones are swallowed...

clasts. Pentelic marble is divided into 3 units distinguishable by δ13C and δ18O values. δ13C and δ18O values have been used to precisely match marbles from...

intensive chemical weathering in the Deccan basalts. Abrupt increase in δ13C values and decrease in TOC content accompanied with a significant increase...

between minerals can be used to estimate the temperature of equilibration. The δ13C and δ34S of coexisting carbonate minerals and sulfides can be used to determine...

period is marked by a prominent negative excursion in carbon stable isotope (δ13C) records from around the globe; more specifically, there was a large decrease...

photosynthesis. The fraction is generally compared to a standard sample using a ratio δ13C expressed in parts per thousand. Common rocks from the mantle such as basalts...

a duration of 60 ± 48 thousand years. A large, abrupt global decrease in δ13C, the ratio of the stable isotope carbon-13 to that of carbon-12, coincides...

Rico): Chemical characterization and organic matter provenance using bulk δ13C, C/N, alkaline CuO oxidation-GC/MS, and solid-state". Geochemistry, Geophysics...

Period/System (2250–2060 Ma) – names are respectively for the Lomagundi–Jatuli δ13C isotopic excursion event spanning its duration, and for the (proposed) first...

on 29 December 1898. Recent studies on the isotopic signature analysis of Δ13C and Nitrogen-15 in their bone collagen and hair keratin were published in...

Stage (the base of the Ypresian) is defined at a strong negative anomaly in δ13C values at the global thermal maximum at the Paleocene-Eocene boundary. The...

span formality Formal Lower boundary definition Strong negative anomaly in δ13C values at the PETM Lower boundary GSSP Dababiya section, Luxor, Egypt 25°30′00″N...

upwelling of the northwestern coast of Africa, planktonic foraminiferal δ13C records show upwelling and primary productivity were not enhanced during...

sediment hydroxyarchaeol had very depleted δ13C at methane seeps. Both the methane and DIC present also had depleted δ13C values, but not as a perfect match to...

lasted from 234 to 227 Ma. At the Carnian-Norian boundary occurred a positive δ13C excursion believed to signify an increase in organic carbon burial. From...

2019). "Sea level, carbonate mineralogy, and early diagenesis controlled δ13C records in Upper Ordovician carbonates". Geology. 48 (2): 194–199. doi:10...

2021). "Improved Constraints on Global Methane Emissions and Sinks Using δ13C-CH4". Global Biogeochemical Cycles. 35 (6): e2021GB007000. Bibcode:2021GBioC...

symbol. Per mille may be used to express stable-isotope ratios—for example: "δ13C was measured at −3.5‰" In Italy, it is possible to nominate a charity or...

San Luis Potosí, inhabited closed vegetation, based on the individual's δ13C signature. Consuming C3 resources, its diet may have incorporated local C3...

growing in brackish waters are almost solely asexual. Brown algae have a δ13C value in the range of −30.0‰ to −10.5‰, in contrast with red algae and greens...