Density contrast

{
  "id": "MLC-T-OAG-004283",
  "term": "Density contrast",
  "field": "Oil and gas",
  "definition": "The difference in bulk density between a body and its surroundings or between adjacent rock layers. In gravity surveys it is the quantity that produces an anomaly: a body denser than its host gives a positive anomaly, a lighter one a negative anomaly. In seismic reflection it contributes to the impedance contrast, but a reflection also requires a velocity contrast, since acoustic impedance is density multiplied by velocity.",
  "subject": "Geophysics",
  "url": "https://mlchart.com/terminology/oil-and-gas/density-contrast/"
}