The Sewanee Amber Collection consists of 154 pieces of fossil-bearing Baltic amber. The amber was collected from a mine near Kaliningrad, Russia (formerly Koenigsberg, Prussia) in 1889 by American mining engineer Henry de Meli.

In 1945, de Meli’s daughter Marie Bischoff fled Dresden, Germany with the collection before the advancing Russian army. The collection was ultimately given to the University of the South in 1965, where it remains in the University Archives. Retired University of the South Biology professor Harry Yeatman and his wife Jean Yeatman were responsible for acquiring the collection for the University and for identifying the organisms trapped in the amber.

Dr. Martin KnollIn the spring of 2000, Geology professor Martin Knoll transported the collection to the University of Hamburg, Germany, where the samples were systematically studied by renowned amber expert Dr. Wolfgang Weitschat. Select samples were prepared and photographed by Weitschat. The photomicrographs of these samples appear on the following pages. In accordance with the practice of the times, the amber samples were cut into small cubes shortly after their collection in order to isolate and highlight the individual fossils. Through over 100 years of exposure to oxygen and light the samples have become darkened and their surfaces cracked.

A Word About Baltic Amber

Amber is a natural fossilized tree resin that shows conchoidal fracture, has a melting point of 200 to 380 degrees centigrade, and has a hardness of 2 to 3. Amber originates from the chemically complex resins produced by the parenchyma cells of conifers (although angiosperms may also produce some resin). After deposition and burial, resin undergoes prolonged oxidization and polymerization in the presence of sea water to ultimately form amber. Trees extrude resin as a means of healing wounds caused by events such as breaking of branches or boring by insects. While resin is extruded animals and plant matter may become trapped in the sticky material to eventually become preserved in the amber. Such fossils are little altered from their original state, except that the soft interior tissue has decayed to form a fluid and leaked from the body. These fluids often combine with the still fluid resin to form a white emulsion on the outside of the body of the organism. Heating by sunlight has usually caused this emulsion to escape the amber on the side of the body facing away from the tree trunk. The tree-facing side of the body, however, often retains the cloudy emulsion.

One of the unique features of Baltic amber is the presence of stellate hairs from oak trees. These are small, radially branched growths that cover portions of flowers and leaves. Their presence is often interpreted to indicate resin formation during the spring of the year.

The amber formed in a northern German forest during the Eocene Epoch, approximately 50 million years ago.