MLchartDataset catalogue

Downlap

Term · Oil and gas · MLC-T-OAG-001156

A seismic reflection pattern where younger, overlying strata terminate progressively downwards against an older, underlying inclined surface. This geometry indicates a period of progradation, where sediment supply outpaced subsidence, causing deposition to extend basinward. Downlap surfaces are key features in sequence stratigraphy, often marking sequence boundaries or maximum flooding surfaces.

Table 1. Record
IdentifierMLC-T-OAG-001156
FieldOil and gas
SubjectGeology
Record as JSON 
{
  "id": "MLC-T-OAG-001156",
  "term": "Downlap",
  "field": "Oil and gas",
  "definition": "A seismic reflection pattern where younger, overlying strata terminate progressively downwards against an older, underlying inclined surface. This geometry indicates a period of progradation, where sediment supply outpaced subsidence, causing deposition to extend basinward. Downlap surfaces are key features in sequence stratigraphy, often marking sequence boundaries or maximum flooding surfaces.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/downlap/"
}

Record 1,238 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.