Geologic Mapping of a Research Site
Alamo Research Structure

Mapping is an essential skill in the field of geology. The practice of mapping involves describing rocks as they are seen at the surface and taking measurements of their thickness and orientations. This allows us to project them into the ground where they become covered by overburden. When enough of these measurements are taken a geologic map can be made which plots the distribution of bedrock units. This is the method we are using to determine the size and extent of the crater caused by the Alamo impact. A very specific rock type was created by this impact but has since been buried and rearranged by mountain building events leaving relatively little that can be observed at the earth's surface. By using mapping techniques we are able to show the distribution of this rock unit and understand the morphology of the crater.