Editing List of geologists (section)

==A==
<!-- Please note, this is not intended to be a list of every geologist with a wiki page. Please limit additions to famous or especially notable  geologists. Thank you!-->

[[Image:Louis Agassiz-2.jpg|thumb|upright|[[Louis Agassiz]] ]]
* [[Vladimir Abazarov]] (1930–2003), Soviet [[geologist]], discoverer of [[Samotlor oil field]]
* [[Aziz Ab'Saber]] (1924–2012), Brazilian [[geomorphologist]], member [[Brazilian Academy of Sciences]]
* [[Otto Wilhelm Hermann von Abich]] (1806–1886), German [[mineralogist]]
* [[Louis Agassiz]] (1807–1873), Swiss-American geologist, work on [[ice age]]s, [[glacier]]s, [[Lake Agassiz]]
* [[Georgius Agricola]] (Georg Bauer) (1494–1555), German naturalist and 'Father of [[Mineralogy]]', author of [[De re metallica]]
* [[Ulisse Aldrovandi]] (1522–1605), Italian, [[Renaissance]] naturalist
* [[Claude Allègre]] (1937–2025), French [[geochemist]], member of the [[French Academy of Sciences]]
* [[Fernando Flávio Marques de Almeida]] (1916–2013), Brazilian geologist, member [[Brazilian Academy of Sciences]]
* [[Walter Alvarez]] (born 1940), American, co-author of the impact theory for the [[Cretaceous–Paleogene extinction event]]
* [[J. Willis Ambrose]] (1911–1974), first President of [[Geological Association of Canada]]
* [[Ernest Masson Anderson]] (1877–1960), Scottish structural geologist, influential in theory of [[Fault (geology)|faulting]]
* [[Roy Chapman Andrews]] (1884–1960), American explorer and naturalist; Mongolian dinosaurs
* [[Mary Anning]] (1799–1847), English pioneer fossil collector
* [[Adolphe d'Archiac]] (1802–1868), French [[paleontologist]], member [[French Academy of Sciences]]
* [[Giovanni Arduino (geologist)|Giovanni Arduino]] (1714–1795), Italian, first classification of [[geological time]]
* [[Richard Lee Armstrong]] (1937–1991), American/Canadian [[Geochemistry|geochemist]], won [[Logan Medal]]
* [[Rosemary Askin]] (born 1949), first [[New Zealand]] woman to undertake her own research program in Antarctica in 1970.<ref name=":0">{{Cite book|url=https://books.google.com/books?id=fRJtB2MNdJMC|title=Encyclopedia of the Antarctic|last=Riffenburgh|first=Beau|date=2007-01-01|publisher=Taylor & Francis|isbn=9780415970242|language=en}}</ref>
* [[Tanya Atwater]] (born 1942), California, American [[geophysicist]], marine geologist, [[plate tectonics]] specialist