Gertjan Krijgsman is a Dutch geologist known for his work in the field of sedimentology and stratigraphy. He has contributed significantly to the understanding of geological processes and the history of the Earth's surface. His research often focuses on the analysis of sedimentary rocks and their formation. Krijgsman has been involved in various academic projects and has published numerous scientific papers. He is associated with institutions such as Utrecht University and has collaborated with other researchers in the field. His work helps to advance knowledge about geological time scales and the evolution of landscapes.