Every four years micropaleontologists from across the globe gather in Houston, Texas for the quadrennial conference of the North American Micropaleontology Section-SEPM (NAMS) to learn, share, and network on applied micropaleontology. Geologic Problem Solving with Microfossils IV was held on April 5-8, 2017 with 130 participants. Fourteen of the 95 presentations were selected for publication, which includes papers on geologic applications utilizing foraminifera (benthic and planktic), calcareous nannofossils, palynology, and conodonts, in studies of rocks and sediments ranging from the Pennsylvanian to the modern.