Paleontology / Paleoclimatology

Gypsum: Isotopes & Dating

Gypsum is a relatively soft and common mineral made up of hydrous
calcium sulfate (CaSO4-2H2O). Whilst pure gypsum crystals are transparent
(often with a pearly or vitreous luster), they can appear opaque and colored
due to the inclusion of other materials (e.g. sand).

Strontium dating of foraminifera, shells & corals

Strontium dating (as enabled by the 87Sr/86Sr ratio of marine carbonates) can be used to date various marine samples based on the premise that the mixing of oceanic strontium occurs relatively rapidly through time compared to the residence time of oceanic strontium.

Provenancing Dust in Ice Core records using Isotopes

Ice core records are an important foundational archive for paleoclimatology. Through them scientists have reconstructed high resolution atmospheric CO2 and temperature records covering hundreds of thousands of years.

Quality Considerations for Bone Samples

Bones and teeth are relatively common within the archaeological and paleontological record due to the tendency for high preservation after burial.

NEW Strontium Chronology Service Available

Isobar Science is now offering a Strontium Chronology Service for dating marine carbonate samples. Strontium Isotope Ratios (87Sr/86Sr) within the ocean have varied through time, creating a predictable seawater curve that can be used for dating calibration.

Best Practices When Selecting Bone Samples

Bones and teeth can be used for a variety of different isotopic analyses, including Oxygen, Strontium, Lead, Neodymium, Carbon, Nitrogen and dating (radiocarbon and in some cases Uranium-Thorium). There are important requirements for bone samples to ensure they produce accurate results.

Free Webinar on Strontium + Boron in Hydrochemistry

Isobar’s webinar will focus on boron and strontium to identify isotopic variability in the hydrosphere, including identification of pollution sources.

Cave Deposits: Chronology Development & Environmental Reconstruction

Caves are natural intact cavities found in many different landscapes which have been accessible to humans and animals for millions of years.

The Altitude Effect of Biogenic Apatite

Biogenic apatite is a molecule made up of calcium, phosphorus and oxygen. Importantly, the phosphorus is found primarily in the form of phosphate (PO4) – which is present in both soft and hard tissues in organisms.

Isotopes & Dating in Marine Environments

There are numerous different options for dating marine samples, each with applicable timespans, levels of certainty and limitations.