Division of Water Resources Geophysical Logs received during the completion of a well. A detailed record (a well log) of the geologic formations penetrated by a well. Contains Aquifer Top, Bottom, and Saturated Sand Thickness. Geophysical Log images associated with oil and gas exploration are typically stored in the Colorado Oil and Gas Information System (COGIS) https://cogcc.state.co.us/data.html
Data Dictionary (Groundwater - Geophysical Logs)
Ask DWR: Other Questions About Groundwater - Geophysical Logs