With approximately 60,000 specimens, the Burke’s collection of fossil leaves, flowers, seeds and fruits, wood, plant microfossils (pollen, plant silica or phytoliths), and fossil insects are the second largest on the West Coast.
Although plant fossils from all over western North America are represented, the focus of these collections is primarily the Cenozoic of the Pacific Northwest. For example, they encompass Eocene macrofossils and insects from Republic, WA, and other Okanagan Highlands floras, and Miocene permineralized wood. The fossil phytolith collection is among the largest in the world, and includes over 6,500 mainly Cretaceous and Cenozoic assemblages.
Apart from fossils, comprehensive reference collections of modern leaves, wood, pollen and phytoliths exist to aid in identification of fossils.