Soils comprise the largest terrestrial carbon (C) pool, containing both organic and inorganic
C. Soil inorganic carbon (SIC) was frequently disregarded because (1) it is partly heritage …

Interest in palustrine carbonates and calcretes has increased over the last 20 years since
they contain significant environmental information. Much of the work performed in this area …

The oldest Oldowan tool sites, from around 2.6 million years ago, have previously been
confined to Ethiopia's Afar Triangle. We describe sites at Nyayanga, Kenya, dated to 3.032 …

Between 8 and 6 million years ago, there was a global increase in the biomass of plants
using C4 photosynthesis as indicated by changes in the carbon isotope ratios of fossil tooth …

CARBON isotopes from soil carbonate1–4 and soil organic matter5, 6 yield
palaeoecological information because the carbon in the soil carbonate forms in isotopic …

Stable carbon and oxygen isotopes (δ18O and δ13C values) and trace elements have been
applied to the study of diagenesis of carbonate rocks for over 50 years. As valuable as these …

The natural and stable isotopes of carbon vary in systematic ways largely determined by the
photosynthetic pathway (C 3 or C 4) which fixes atmospheric CO 2 into organic matter …

We explore the relationships of the stable carbon and oxygen isotopic composition of
modem soil carbonates in relation to ecologic and climatic variables. The carbon system can …

[en] This chapter summarizes stable carbon isotope ratios of most natural materials of
biological interest range from approximately 0 to-110 per-thousand versus PDB. This …

THE most common and the most primitive pathway of the three different photosynthetic
pathways used by plants is the C3 pathway, or Calvin cycle, which is characterized by an …