MLchartDataset catalogue

Onlap

Term · Oil and gas · MLC-T-OAG-002621

A stratigraphic relationship where younger sedimentary layers terminate progressively against an older, inclined surface. This pattern indicates a transgression, where sea level is rising relative to the land, causing sediments to be deposited further inland. Onlap surfaces are often key indicators of sequence boundaries in seismic stratigraphy.

Table 1. Record
IdentifierMLC-T-OAG-002621
FieldOil and gas
SubjectGeology
Record as JSON 
{
  "id": "MLC-T-OAG-002621",
  "term": "Onlap",
  "field": "Oil and gas",
  "definition": "A stratigraphic relationship where younger sedimentary layers terminate progressively against an older, inclined surface. This pattern indicates a transgression, where sea level is rising relative to the land, causing sediments to be deposited further inland. Onlap surfaces are often key indicators of sequence boundaries in seismic stratigraphy.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/onlap/"
}

Record 2,795 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.