"alkali basalt" meaning in English

{
  "forms": [
    {
      "form": "alkali basalts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "alkali basalt (plural alkali basalts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "Geology",
          "orig": "en:Geology",
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "alkalibasaltic"
        }
      ],
      "examples": [
        {
          "ref": "2003, R. R. Hillis, Evolution and Dynamics of the Australian Plate, page 213:",
          "text": "The largest central volcanoes (Peak Range and Springsure) occupy the 'swell' in that arc, which peters out southwards into tholeiitic and finally subsurface alkali basalt intrusives (Roma drilling results).",
          "type": "quote"
        }
      ],
      "glosses": [
        "An alkaline variety of basalt."
      ],
      "id": "en-alkali_basalt-en-noun-D8etTfmc",
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "alkaline",
          "alkaline"
        ],
        [
          "basalt",
          "basalt"
        ]
      ],
      "raw_glosses": [
        "(geology) An alkaline variety of basalt."
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "alkali basalt"
      ]
    }
  ],
  "word": "alkali basalt"
}

{
  "derived": [
    {
      "word": "alkalibasaltic"
    }
  ],
  "forms": [
    {
      "form": "alkali basalts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "alkali basalt (plural alkali basalts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "en:Geology"
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      "examples": [
        {
          "ref": "2003, R. R. Hillis, Evolution and Dynamics of the Australian Plate, page 213:",
          "text": "The largest central volcanoes (Peak Range and Springsure) occupy the 'swell' in that arc, which peters out southwards into tholeiitic and finally subsurface alkali basalt intrusives (Roma drilling results).",
          "type": "quote"
        }
      ],
      "glosses": [
        "An alkaline variety of basalt."
      ],
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "alkaline",
          "alkaline"
        ],
        [
          "basalt",
          "basalt"
        ]
      ],
      "raw_glosses": [
        "(geology) An alkaline variety of basalt."
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "alkali basalt"
      ]
    }
  ],
  "word": "alkali basalt"
}