Tuff

{
  "id": "MLC-T-OAG-003950",
  "term": "Tuff",
  "field": "Oil and gas",
  "definition": "A fine-grained, porous rock formed from volcanic ash and dust ejected during an eruption, which then settles and compacts. It often contains fragments of other rocks and minerals. Tuff can serve as a reservoir rock if it has sufficient porosity and permeability, though it is less common than sandstone or carbonate reservoirs.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/tuff/"
}