Gravitational Method, 3

If all the previously mentioned causes did not exist or if all the appropriate corrections have been made, g varies from one point to another over the reference plane. These variations are due to the differences in the constitution of the substrata and its structure. That is exactly what is to be studied. A schematic diagram illustrating gravimetry principles using spring–mass systems responding to subsurface density variations and gravitational field changes. https://www.w3.org/1999/xlink" xlink:href="#long-desc72"/> https://www.w3.org/1999/xlink" xlink:href=" https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003761020/e10523ab-dbe3-4c4f-8f3e-863ae3683950/content/pg351_1.tif "/>