"caprock" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cap",
        "3": "rock"
      },
      "expansion": "cap + rock",
      "name": "compound"
    }
  ],
  "etymology_text": "From cap + rock.",
  "forms": [
    {
      "form": "caprocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
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      "expansion": "caprock (countable and uncountable, plural caprocks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "other",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geology",
          "orig": "en:Geology",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rocks",
          "orig": "en:Rocks",
          "parents": [
            "Geology",
            "Natural materials",
            "Earth sciences",
            "Materials",
            "Nature",
            "Sciences",
            "Manufacturing",
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            "Human activity",
            "Fundamental",
            "Human behaviour",
            "Human"
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      "examples": [
        {
          "ref": "2009 September 3, James Glanz, “Energy Company Calls Halt to Drilling Project”, in New York Times:",
          "text": "Last month, federal scientists said that the company had fallen far behind schedule because a huge rig hired to drill down about 12,000 feet, or more than two miles, on federal land had not been able to pierce surface formations called caprock.",
          "type": "quote"
        },
        {
          "ref": "2013, Philipp Meyer, The Son, Simon & Schuster, published 2014, page 424:",
          "text": "Meanwhile, there were houses going up within gunshot of the caprock.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A harder or more resistant rock type overlying a weaker or less resistant rock type."
      ],
      "id": "en-caprock-en-noun-HMHr0tzE",
      "links": [
        [
          "geology",
          "geology"
        ],
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          "rock",
          "rock"
        ]
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      "raw_glosses": [
        "(geology) A harder or more resistant rock type overlying a weaker or less resistant rock type."
      ],
      "related": [
        {
          "word": "aquitard"
        },
        {
          "word": "capstone"
        }
      ],
      "synonyms": [
        {
          "word": "cap rock"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "Translations",
          "word": "蓋層"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "gàicéng",
          "sense": "Translations",
          "word": "盖层"
        }
      ]
    }
  ],
  "word": "caprock"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cap",
        "3": "rock"
      },
      "expansion": "cap + rock",
      "name": "compound"
    }
  ],
  "etymology_text": "From cap + rock.",
  "forms": [
    {
      "form": "caprocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
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      "expansion": "caprock (countable and uncountable, plural caprocks)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "aquitard"
    },
    {
      "word": "capstone"
    }
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        "en:Geology",
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          "ref": "2009 September 3, James Glanz, “Energy Company Calls Halt to Drilling Project”, in New York Times:",
          "text": "Last month, federal scientists said that the company had fallen far behind schedule because a huge rig hired to drill down about 12,000 feet, or more than two miles, on federal land had not been able to pierce surface formations called caprock.",
          "type": "quote"
        },
        {
          "ref": "2013, Philipp Meyer, The Son, Simon & Schuster, published 2014, page 424:",
          "text": "Meanwhile, there were houses going up within gunshot of the caprock.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A harder or more resistant rock type overlying a weaker or less resistant rock type."
      ],
      "links": [
        [
          "geology",
          "geology"
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          "rock",
          "rock"
        ]
      ],
      "raw_glosses": [
        "(geology) A harder or more resistant rock type overlying a weaker or less resistant rock type."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
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  "synonyms": [
    {
      "word": "cap rock"
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "Translations",
      "word": "蓋層"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "gàicéng",
      "sense": "Translations",
      "word": "盖层"
    }
  ],
  "word": "caprock"
}