"marlstone" meaning in English

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        "2": "marl",
        "3": "stone"
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      "expansion": "marl + stone",
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  ],
  "etymology_text": "From marl + stone.",
  "forms": [
    {
      "form": "marlstones",
      "tags": [
        "plural"
      ]
    }
  ],
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      "args": {
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      "expansion": "marlstone (countable and uncountable, plural marlstones)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "ref": "1961 July, C. P. Walker, P. H. V. Banyard, “Leicester's Belgrave Road branch lives another year”, in Trains Illustrated, page 414:",
          "text": "The steady climb eastwards has lifted us from the Soar Valley at Leicester into the marlstone (or ironstone) country of the Middle Lias which, at this point, forms a ridge of high ground over 700ft above sea level, […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "Marl when hardened into stone."
      ],
      "id": "en-marlstone-en-noun-BIe6Vcl2",
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        [
          "geology",
          "geology"
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        [
          "Marl",
          "marl"
        ],
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          "stone",
          "stone"
        ]
      ],
      "raw_glosses": [
        "(geology) Marl when hardened into stone."
      ],
      "tags": [
        "countable",
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      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "hardened marl",
          "word": "merkelikivi"
        }
      ]
    }
  ],
  "word": "marlstone"
}

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      "args": {
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        "2": "marl",
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  ],
  "etymology_text": "From marl + stone.",
  "forms": [
    {
      "form": "marlstones",
      "tags": [
        "plural"
      ]
    }
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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1961 July, C. P. Walker, P. H. V. Banyard, “Leicester's Belgrave Road branch lives another year”, in Trains Illustrated, page 414:",
          "text": "The steady climb eastwards has lifted us from the Soar Valley at Leicester into the marlstone (or ironstone) country of the Middle Lias which, at this point, forms a ridge of high ground over 700ft above sea level, […]",
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        }
      ],
      "glosses": [
        "Marl when hardened into stone."
      ],
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          "geology",
          "geology"
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          "Marl",
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        "(geology) Marl when hardened into stone."
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  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "hardened marl",
      "word": "merkelikivi"
    }
  ],
  "word": "marlstone"
}