Methodology of Gravimetric Survey and Data Visualization. Gravity measurements detect variations in mass density; denser stone pulls more strongly. 1986 French team (Jacques Montron & Pierre Del) collected the data; later re‑analysis used 34 prism sections. Wallace corrected earlier diagram errors and produced a 3‑D density model with a green‑to‑red gradient.

Gravity surveys detect mass density variations—denser stone pulls harder. A 1986 French team (Jean Montron & Pierre Del) collected the data; re-analysis used 34 prism sections and Wallace's 3‑D model with a green‑to‑red gradient.

Key Facts

  • Gravity measurements detect variations in mass density; denser stone pulls more strongly.
  • 1986 French team (Jacques Montron & Pierre Del) collected the data; later re‑analysis used 34 prism sections.
  • Wallace corrected earlier diagram errors and produced a 3‑D density model with a green‑to‑red gradient.