Entries by Haley Gershon

Sediments Webinar: Dating & Environmental Reconstructions

Isobar Science and Beta Analytic’s webinar on sediments focuses on dating & environmental reconstructions. This complimentary webinar takes place on December 2, 2021 at 12:00 PM Eastern Time (US and Canada).

Analysing lake sediment cores: from dating to paleoclimate reconstructions

Sediments used for climate and environmental reconstructions come in many different forms (including lacustrine, marine, peat, terrestrial and aeolian deposits) and can be characterized by their grain size, shape, sedimentary facies, chemical and biological composition and accumulation/sedimentation rate.

Developing Chronologies for Reconstructing Past Climates

Paleoclimate archives are generally dated using two main methods: radiocarbon and uranium-thorium dating. 14C dating tends to be more accurate, however, it can only be used on samples that are less than around 50,000 years old. Whereas U-Th dating can be used for the last 500,000 years.

Analysing Water Samples

Stable and radioactive isotopes can be analysed in groundwater and surface water samples in order to assess the magnitude and origin of pollution, rate of pollution infiltration into the environment, and timing of water interactions with the atmosphere.