The volcanic island of Surtsey, located about 30 km south of Iceland, is an iconic place for geologists. It represents a natural laboratory for the study of volcanic activity, rapid erosion, island biology, and species colonization. A fascinating research project, partly funded by GRI, has looked at some unique trackways preserved in the volcanic deposits of the island. The trackways consist of boot impressions left by early visitors who were exploring the island just a few years after it had emerged above sea level. Learn more from this article about the conditions necessary for preservation of footprints in the geologic record.