In general, our research falls into three main categories: 1) sedimentology and stratigraphy, which includes examining modern and paleo-critical zone processes or using chemostratigraphy, magnetostratigraphy, and basin-scale macrostratigraphy to describe past depositional environments; 2) paleoclimatology and paleoecology, which includes developing and integrating terrestrial records (paleosols, paleobotany) to describe past climate and ecology or using proxy records to develop comparative models of major climate events; and 3) geochemistry, which includes using paleosol geochemistry and magnetic mineralogy to develop new paleoclimate proxies or developing new methods and applications for organic, traditional carbonate, or clumped isotope chemistry and thermometry. For information on specific projects/papers/grants, see below:
Clumped isotopes (D47)
We are starting new projects in applying the clumps to terrestrial settings, like estimating warm month temps and seasonality from paleosols, or comparing independent clumped and paleobotanical temps from carbonates surrounding lacustrine-preserved floral assemblages.
See Hyland et al. (in review; Geology) or Hyland & Huntington (in review; EPSL)
Early Eocene Climatic Optimum (EECO)
We are continuing and expanding our work on terrestrial records of the early Eocene, including new high-latitude climate and ecology records, as well as developing new carbon-cycle models to describe the causes of the EECO.
See Hyland & Sheldon (2013), Hyland et al. (2013), or Hyland et al. (2017; GSAB)
Paleogene hyperthermals (e.g., MPBE)
We are starting new projects developing terrestrial records of other Paleogene hyperthermals, such as the mid-Paleocene biotic event (MPBE), and comparing them to marine records to provide context.
See Hyland et al. (2015) or Hyland & Sheldon (2017)
Developing and comparing new terrestrial proxies
We are also expanding in a new direction on terrestrial proxies both from paleosols (magnetics, clumped isotopes) and from botanical records (phytoliths, macrofossils), in an effort to improve our high resolution records of past environments.
See Hyland et al. (2013b), Hyland (2014), Hyland et al. (2015b), or Hyland & Sheldon (2016)
Understanding the Mio-Pliocene transition
We are working on multiple projects to understand the rise of the grassland biome and the climatic and environmental conditions of the Miocene-Pliocene transition, in both North and South America.
See Cotton et al. (2014) or Hyland et al. (in review; EPSL)
Exploring Saudi Arabia
We are pursuing new projects on understanding the environmental history of the Arabian Peninsula, working on providing ecological and climatic context while prospecting for important new paleontological finds in the region (including new primate Saadanius)
See Zalmout et al. (2010)
For more information or citations, see our “Publications” page.