MLchartDataset catalogue

Marker bed

Term · Oil and gas · MLC-T-OAG-002282

A thin, distinctive rock layer that is recognizable over a wide area and therefore serves for correlation between wells and seismic lines. Coal seams, limestones, volcanic ash layers and condensed shales are typical examples. Where the layer contrasts strongly in acoustic impedance with its neighbours it gives a continuous seismic reflection that interpreters map as a reference horizon.

Table 1. Record
IdentifierMLC-T-OAG-002282
FieldOil and gas
SubjectGeophysics
Record as JSON 
{
  "id": "MLC-T-OAG-002282",
  "term": "Marker bed",
  "field": "Oil and gas",
  "definition": "A thin, distinctive rock layer that is recognizable over a wide area and therefore serves for correlation between wells and seismic lines. Coal seams, limestones, volcanic ash layers and condensed shales are typical examples. Where the layer contrasts strongly in acoustic impedance with its neighbours it gives a continuous seismic reflection that interpreters map as a reference horizon.",
  "subject": "Geophysics",
  "url": "https://mlchart.com/terminology/oil-and-gas/marker-bed/"
}

Record 2,436 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.