Students will plot extensive hornfels developed in pelitic and calcareous lithologies, including local skarn deposits that have been mined for magnetite. Terrain is cut by later normal faults. Map, cross sections and complete geologic report prepared. Mapping volcanic terrain in San Juan Volcanic Field. Students work out a volcanic stratigraphy and decipher timing of syn- and post eruptive faults.
Mapping is on air photo and topographic bases.
Students combine their mapping from subareas into a composite map of a large area and prepare a geologic report and resource assessment on that basis. Students prepare a geologic history of the area based on their observations and develop a resource evaluation map. Emphasis is on interpretive thinking and independent selection of data required to prepare the geologic history. Air photo and topographic map bases. Underground mine mapping.