# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/jean-baptiste-julien-d-omalius-d-halloy
# Generated: 2026-08-16T08:44:49.351Z

schema: https://schema.org/Person
url: "https://fame.am/person/jean-baptiste-julien-d-omalius-d-halloy"
name: "Jean Baptiste Julien d'Omalius d'Halloy"
slug: "jean-baptiste-julien-d-omalius-d-halloy"
description: "Jean Baptiste Julien d'Omalius d'Halloy was a Belgian statesman and geologist. He was the first to define the Cretaceous as a distinct geological period, in 1822. He produced the first geological map of France, the Benelux, the Rhineland and Switzerland, completed in 1813 and published in 1822. Halloysite, a clay mineral, was named in his honour. He also wrote on races."
tagline: "Belgian geologist (1783-1875)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Omalius_d'Halloy.jpg?width=1200"
gender: "male"
category:
  name: "Politicians"
  slug: "politicians"
profileType:
  name: "Politician"
  slug: "politician"
birthDate: "1783-02-16"
deathDate: "1875-01-15"
livingStatus: "DECEASED"
scores:
  popularity:           43.41
  momentum:             3.333333333333333
  historical:           9.143269333333333
  currentAttention:     0
  sourceConfidence:     54.99999999999999
  profileCompleteness:  60
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://wa.wikipedia.org/wiki/Jean-Baptiste_d'Omalius_d'Haloy"
    title: "Jean-Baptiste d'Omalius d'Haloy"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Jean_Baptiste_Julien_d%E2%80%99Omalius_d%E2%80%99Halloy"
    title: "Jean Baptiste Julien d’Omalius d’Halloy"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Jean_Baptiste_Julien_d'Omalius_d'Halloy"
    title: "Jean Baptiste Julien d'Omalius d'Halloy"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Jean_d'Omalius_d'Halloy"
    title: "Jean d'Omalius d'Halloy"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Jean-Baptiste_Julien_d'Omalius_d'Halloy"
    title: "Jean-Baptiste Julien d'Omalius d'Halloy"
    type:  "WIKIPEDIA"
  - url: "https://ko.wikipedia.org/wiki/%EC%9E%A5_%EB%8F%84%EB%A7%90%EB%A6%AC%EC%9A%B0%EC%8A%A4_%EB%8B%AC%EB%A1%9C%EC%9D%B4"
    title: "장 도말리우스 달로이"
    type:  "WIKIPEDIA"
  - url: "https://nl.wikipedia.org/wiki/Jean_d'Omalius_d'Halloy"
    title: "Jean d'Omalius d'Halloy"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%9E%D0%BC%D0%B0%D0%BB%D0%B8%D1%83%D1%81_%D0%B4%E2%80%99%D0%90%D0%BB%D0%BB%D1%83%D0%B0%2C_%D0%96%D0%B0%D0%BD_%D0%91%D0%B0%D1%82%D0%B8%D1%81%D1%82_%D0%96%D1%8E%D0%BB%D1%8C%D0%B5%D0%BD"
    title: "Омалиус д’Аллуа, Жан Батист Жюльен"
    type:  "WIKIPEDIA"
  - url: "https://sv.wikipedia.org/wiki/Jean_Baptiste_Julien_d'Omalius_d'Halloy"
    title: "Jean Baptiste Julien d'Omalius d'Halloy"
    type:  "WIKIPEDIA"
  - url: "https://uk.wikipedia.org/wiki/%D0%96%D0%B0%D0%BD_%D0%91%D0%B0%D1%82%D0%B8%D1%81%D1%82_%D0%96%D1%8E%D0%BB%D1%8C%D1%94%D0%BD_%D0%B4'%D0%9E%D0%BC%D0%B0%D0%BB%D1%96%D1%83%D1%81_%D0%B4'%D0%90%D0%BB%D0%BB%D1%83%D0%B0"
    title: "Жан Батист Жюльєн д'Омаліус д'Аллуа"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q1323652"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump