Joseph L. Kirschvink (born 1953) is an American geologist and geophysicist. He is the Nico and Marilyn Van Wingen Professor of Geobiology at Caltech,^[1] known for contributions to paleomagnetism^[2] and biomagnetism^[3] (discovery of the first magnetofossils) and the Snowball Earth hypothesis.^[4] He is also Principal Investigator (PI) of Earth–Life Science Institute.

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In 1988, Kirschvink was recognized as a "Rising Star" in Southern California by the Los Angeles Times.^[5] In 2021, Caltech settled with the Department of the Interior to pay $25,465 for damages to petroglyph sites in Volcanic Tablelands after they were damaged by Dr. Kirschvink on Earth Day 2017.^[6][7]

• Greenhouse and icehouse Earth