porosity, total

{
  "id": "MLC-T-ENV-021631",
  "term": "porosity, total",
  "field": "Environment",
  "definition": "The volume fraction of a rock or unconsolidated sediment not occupied by solid material but usually occupied by water and/or air. Primary porosity is the percentage of the voids in the rock at the time of formation, and secondary porosity refers to the void space from fractures and dissolution.",
  "subject": "Land, waste and cleanup",
  "references": [
    "Glossary of Technical Terms: Office of Underground Storage Tanks"
  ],
  "url": "https://mlchart.com/terminology/environment/porosity-total/"
}