My Research and Expertise

My major research interest includes the study of the geographical distribution, physical properties, composition, petrography, age, and origin of tektites and microtektites. I am also interested in the possible correlation of major impacts (particularly tektite events) with climatic changes, extinctions, and geomagnetic reversals as recorded in deep-sea sediments. I have a general interest in deep sea sedimentation and Cenozoic stratigraphy. I am also interested in impact catering and shock metamorphism. I spent 5 years studying lunar glasses (from both Apollo and Union of Soviet Socialist Republics (USSR) samples). Earlier studies involved magnetostratigraphy and Pleistocene stratigraphy of deep-sea sediments. Present studies include the investigation of impact ejecta associated with both the Australian and North American microtektite layers and the search for the source crater for these two events. Future research will involve the number, geographic extent, and identification of source craters for upper Eocene spherule layers in marine sediments. Another goal is to define new distal impact ejecta varies with distance from the source crater.

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