Granite

{
  "id": "MLC-T-ENV-012480",
  "term": "Granite",
  "field": "Environment",
  "definition": "A coarse-grained intrusive igneous rock with at least 65% silica. Quartz, plagioclase feldspar and potassium feldspar make up most of the rock and give it a fairly light color. Granite has more potassium feldspar than plagioclase feldspar. Usually with biotite, but also may have hornblende.",
  "references": [
    "USGS Geology in the Parks Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/granite/"
}