Heinrich Holland is professor emeritus in the Earth and Planetary Sciences department of Harvard University

Harvard University

Harvard University is a private Ivy League university located in Cambridge, Massachusetts, United States, established in 1636 by the Massachusetts legislature. Harvard is the oldest institution of higher learning in the United States and the first corporation chartered in the country...

. He has made major contributions to in the understanding of the Earth's geochemistry

Geochemistry

The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks, water, and soils, and the cycles of matter and energy that transport the Earth's chemical components in time and space, and...

, especially large-scale geochemical and biogeochemical cycles. He has also contributed to the field of planetary chemistry and planetary evolution.