My work includes service on three international research committees. Over the years I have traveled to many parts of the world in conjunction with this research. Below is a list of the countries I have visited during these trips.

Australia (1976, 1991), Austria (1980), Belgium (1980, 1986), Canada (1975, 1981, 1985, 1988, 1998), China (1983, 1986), Czechoslovakia/Czech Republic (1986, 1999), Denmark (1980), England and Wales (1980, 1985), France (1980), Germany (1980, 1986), Italy (1980), Norway (1980, 1982), Sweden (1980, 1982), Kazakstan (1984, 1990), Russia (1984, 1990), Siberia (1990), Tahiti (on the way to Australia in 1976).

These trips were to attend such meetings as International Geological Congresses, International Symposia on the Ordovician System, International Symposia on the Cambrian System, meetings of the International Working Group on the Cambrian-Ordovician Boundary, and various meetings of the Pander Society (the organization of research specialists on the fossil group that I study).

I usually also attend annual meetings of the Geological Society of America in many different parts of the United States.

My research has taken me to many parts of the United States and Canada. I have published papers based on field research in Utah, Nevada, Texas, Oklahoma, Vermont, Colorado, Wisconsin, and Minnesota. Each year I travel to west-central Utah for field work related to my research on microfossils. This work takes 2-4 weeks each year. I camp in remote areas for 2-3 nights at a time and then drive 40-60 miles to the nearest town to clean up, drop off my rock samples, and buy supplies. Then I go back into the desert for another round. This country consists of desert mountain ranges, and I have worked there since 1965. Some years there are other geologists who are working in the same areas, and we camp together for companionship, safety, to show off special fossils we may have found during the day, and to swap lies around the campfire.