Research interests include evolution and biogeography of Cenozoic vegetation and climate change as documented by fossil plants and pollen.

CURRENT RESEARCH PROJECTS

1. Pursuit of a reliable and accurate method for obtaining quantitative estimates of past climate from tropical African plant fossils.
2. The reconstruction of past environments and documentation of plant species in tropical Africa during the Cenozoic (the last 65 million years), with a focus on critical time periods.
3. Reconstruction of the environment at Folsom, New Mexico, approximately 11,000 years ago.
4. Documenting environmental and cultural plant associations at the Chaves-Hummingbird archaeological site, near Albuquerque, New Mexico.

• SIGNIFICANCE OF BIOTIC AND CLIMATIC RECONSTRUCTION IN TROPICAL AFRICA

• ESTIMATING PAST CLIMATE FROM FOSSIL LEAVES

• ENVIRONMENTS OF THE FIRST AMERICANS