Thus, we express caution in the interpretation of these and other radiocarbon ages obtained on pedogenic carbonate nodules.Multiple sub-mm size subsamples could provide more reliable age estimates. 2600 Australia), AC(Department of Physical Chemistry, University of Sydney, N. Multiple dates from the same horizon, and from carbonates in vertical sequence in the same exposure, were used to test the reliability of those dates.
The radiocarbon ages were obtained using lowlevel scintillation counters and the dates range from ∼24 to 31 C ages should only be considered as estimates and not absolute ages because of the possibility of open-system behaviour with respect to carbon.
After describing the general formation principles of PC, we present the specific forms and formation processes for PC features and the possibilities to use them to reconstruct soil-forming factors and processes.
The following PC are described in detail: earthworm biospheroliths, rhizoliths and calcified roots, hypocoatings, nodules, clast coatings, calcretes and laminar caps.
Saran Wrap) to limit air contact, place them in a Ziplock bag, and ship to us.
– Due to complex soil geochemistry, it may be better to date extracted macrofossils in some circumstances.