"Genesee epoch" meaning in English

{
  "etymology_text": "So-named because the formations of this period crop out in Genesee, New York.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Genesee epoch",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geology",
          "orig": "en:Geology",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The latter subdivision of the Hamilton period in the now obsolete American Devonian system."
      ],
      "id": "en-Genesee_epoch-en-name-JzpHBsdL",
      "links": [
        [
          "geology",
          "geology"
        ]
      ],
      "raw_glosses": [
        "(obsolete, geology) The latter subdivision of the Hamilton period in the now obsolete American Devonian system."
      ],
      "tags": [
        "obsolete"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "Genesee, New York"
      ]
    }
  ],
  "word": "Genesee epoch"
}

{
  "etymology_text": "So-named because the formations of this period crop out in Genesee, New York.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Genesee epoch",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with obsolete senses",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Geology"
      ],
      "glosses": [
        "The latter subdivision of the Hamilton period in the now obsolete American Devonian system."
      ],
      "links": [
        [
          "geology",
          "geology"
        ]
      ],
      "raw_glosses": [
        "(obsolete, geology) The latter subdivision of the Hamilton period in the now obsolete American Devonian system."
      ],
      "tags": [
        "obsolete"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "Genesee, New York"
      ]
    }
  ],
  "word": "Genesee epoch"
}