Final answer:
The volcano that formed in a Mexican cornfield in 1943 is Paricutin. It provided an exceptional case for studying the development of a volcano from its birth to its extinction.
Step-by-step explanation:
The famous volcano that formed in a Mexican cornfield in 1943 is Paricutin. Paricutin is known to be a cinder cone volcano in Mexico that emerged suddenly from a cornfield.
This event provides a rare opportunity for scientists to study the birth, life, and death of a volcano.
Mexico's unique geological setting, with the presence of three tectonic plates, creates a highly seismically active region, making it the site of numerous volcanoes such as Popocatépetl and Ixtaccíhuatl.
The rapid formation of Paricutin offered valuable insights into volcanism and the geological processes that underlie the formation of volcanic features.