Measuring Absolute Gravity on Top of Terry Peak, SD
![Image: Measuring Absolute Gravity on Top of Terry Peak, SD](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/Andy-Rob_TP2_A10.jpg?itok=OAqgUISu)
Detailed Description
USGS researchers made microgravity measurements to determine groundwater-storage changes in the karstic Madison aquifer in the Black Hills of South Dakota during 2009-12. The absolute-gravity measurement was made at a station located on top of Terry Peak in the northern Black Hills.
Sources/Usage
Public Domain.