Looking Below Earth’s Surface Activity Source: Organizing partners of Geologic Map Day are the U.S. Geological Survey, the Association of American State Geologists, the National Park Service, the Geological Society of America, NASA, and the American Geosciences Institute. The Utah Geologic Survey’s interactive “Geologic Map Portal” (https://bit.ly/21xGMD3) allows you to see the geologic map on top of a 3-dimensional surface and topographic map. This is helpful for visualizing how the geology shown on the map appears in nature (image below). [Read More]