List of Geologists - A

A

• Vladimir Abazarov (1930-2003), Soviet geologist, discoverer of Samotlor oil field
• Aziz Ab'Saber (born 1924), Brazilian geomorphologist
• Otto Wilhelm Hermann von Abich (1806–1886), German mineralogist
• Louis Agassiz (1807–1873), Swiss-American geologist, work on ice ages, glaciers, Lake Agassiz
• Georgius Agricola (Georg Bauer) (1494–1555), German naturalist and 'Father of Mineralogy', author of De re metallica
• Ulisse Aldrovandi (1522–1605), Italy, Renaissance naturalist
• Claude Allègre (born 1937), French geochemist
• Fernando Flávio Marques de Almeida (born 1919) Brazilian geologist
• Walter Alvarez (born 1940), USA, co-author of the impact theory for the Cretaceous–Paleogene extinction event
• J. Willis Ambrose, first President of Geological Association of Canada
• Roy Chapman Andrews (1884–1960), American explorer and naturalist; Mongolian dinosaurs
• Mary Anning (1799–1847), England, pioneer fossil collector
• Adolphe d'Archiac (1802–1868), French paleontologist
• Giovanni Arduino (1714–1795), Italian, first classification of geological time
• Richard Lee Armstrong (1937–1991), American/Canadian geochemist
• Tanya Atwater, California, USA geophysicist, marine geologist, plate tectonics specialist